diff --git a/src/base/combination/combo.js b/src/base/combination/combo.js
index 604e2cac9..27d00fc6a 100644
--- a/src/base/combination/combo.js
+++ b/src/base/combination/combo.js
@@ -55,6 +55,9 @@
             });
             this.combo.on(BI.Controller.EVENT_CHANGE, function (type, value, obj) {
                 if (self.isEnabled() && self.isValid()) {
+                    if (type === BI.Events.TOGGLE) {
+                        self._toggle();
+                    }
                     if (type === BI.Events.EXPAND) {
                         self._popupView();
                     }
diff --git a/src/case/combo/bubblecombo/combo.bubble.js b/src/case/combo/bubblecombo/combo.bubble.js
index 2709295d9..5f0a4c720 100644
--- a/src/case/combo/bubblecombo/combo.bubble.js
+++ b/src/case/combo/bubblecombo/combo.bubble.js
@@ -52,6 +52,7 @@ BI.BubbleCombo = BI.inherit(BI.Widget, {
             hideChecker: o.hideChecker,
             offsetStyle: o.offsetStyle,
             showArrow: true,
+            comboClass: o.comboClass,
             el: o.el,
             popup: () => BI.extend({
                 type: "bi.bubble_popup_view",
diff --git a/src/core/constant/events.js b/src/core/constant/events.js
index 2faa2593b..5e1abba85 100644
--- a/src/core/constant/events.js
+++ b/src/core/constant/events.js
@@ -143,6 +143,12 @@ _.extend(BI, {
          */
         COLLAPSE: "_COLLAPSE",
 
+        /**
+         * @static
+         * @property 下拉菜单切换展开收起事件
+         */
+        TOGGLE: "_TOGGLE",
+
         /**
          * @static
          * @property 回调事件
@@ -435,4 +441,4 @@ _.extend(BI, {
          */
         AEMAIL: "afteremail"
     }
-});
\ No newline at end of file
+});
diff --git a/src/widget/multiselect/multiselect.combo.js b/src/widget/multiselect/multiselect.combo.js
index 23d5385b8..2e71071b8 100644
--- a/src/widget/multiselect/multiselect.combo.js
+++ b/src/widget/multiselect/multiselect.combo.js
@@ -173,7 +173,7 @@ BI.MultiSelectCombo = BI.inherit(BI.Single, {
             },
             value: o.value,
             hideChecker: function (e) {
-                return triggerBtn.element.find(e.target).length === 0 && self.numberCounter.element.find(e.target).length === 0;
+                return self.numberCounter.element.find(e.target).length === 0;
             },
         });
 
@@ -198,21 +198,6 @@ BI.MultiSelectCombo = BI.inherit(BI.Single, {
             }
         });
 
-        var triggerBtn = BI.createWidget({
-            type: "bi.trigger_icon_button",
-            width: o.height,
-            height: o.height,
-            cls: "multi-select-trigger-icon-button",
-        });
-        triggerBtn.on(BI.TriggerIconButton.EVENT_CHANGE, function () {
-            self.numberCounter.hideView();
-            if (self.combo.isViewVisible()) {
-                self.combo.hideView();
-            } else {
-                self.combo.showView();
-            }
-        });
-
         this.numberCounter = BI.createWidget({
             type: "bi.multi_select_check_selected_switcher",
             masker: {
@@ -263,11 +248,6 @@ BI.MultiSelectCombo = BI.inherit(BI.Single, {
                 right: 0,
                 top: 0,
                 bottom: 0,
-            }, {
-                el: triggerBtn,
-                right: 0,
-                top: 0,
-                bottom: 0,
             }, {
                 el: {
                     type: "bi.vertical_adapt",
diff --git a/src/widget/multiselect/multiselect.combo.nobar.js b/src/widget/multiselect/multiselect.combo.nobar.js
index ff4cc5d34..a72519750 100644
--- a/src/widget/multiselect/multiselect.combo.nobar.js
+++ b/src/widget/multiselect/multiselect.combo.nobar.js
@@ -174,8 +174,7 @@ BI.MultiSelectNoBarCombo = BI.inherit(BI.Single, {
                 value: o.value
             },
             hideChecker: function (e) {
-                return triggerBtn.element.find(e.target).length === 0 &&
-                    self.numberCounter.element.find(e.target).length === 0;
+                return self.numberCounter.element.find(e.target).length === 0;
             }
         });
 
@@ -200,21 +199,6 @@ BI.MultiSelectNoBarCombo = BI.inherit(BI.Single, {
             }
         });
 
-        var triggerBtn = BI.createWidget({
-            type: "bi.trigger_icon_button",
-            width: o.height,
-            height: o.height,
-            cls: "multi-select-trigger-icon-button"
-        });
-        triggerBtn.on(BI.TriggerIconButton.EVENT_CHANGE, function () {
-            self.numberCounter.hideView();
-            if (self.combo.isViewVisible()) {
-                self.combo.hideView();
-            } else {
-                self.combo.showView();
-            }
-        });
-
         this.numberCounter = BI.createWidget({
             type: "bi.multi_select_check_selected_switcher",
             masker: {
@@ -268,11 +252,6 @@ BI.MultiSelectNoBarCombo = BI.inherit(BI.Single, {
                 right: 0,
                 top: 0,
                 bottom: 0
-            }, {
-                el: triggerBtn,
-                right: 0,
-                top: 0,
-                bottom: 0
             }, {
                 el: {
                     type: "bi.vertical_adapt",
diff --git a/src/widget/multiselect/multiselect.trigger.js b/src/widget/multiselect/multiselect.trigger.js
index 5b39b84dc..4f75b38cb 100644
--- a/src/widget/multiselect/multiselect.trigger.js
+++ b/src/widget/multiselect/multiselect.trigger.js
@@ -83,7 +83,15 @@ BI.MultiSelectTrigger = BI.inherit(BI.Trigger, {
                     el: this.wrapNumberCounter,
                     width: 0
                 }, {
-                    el: BI.createWidget(),
+                    el: {
+                        type: "bi.trigger_icon_button",
+                        height: o.height,
+                        stopPropagation: true,
+                        cls: "multi-select-trigger-icon-button",
+                        handler: function () {
+                            self.fireEvent(BI.Controller.EVENT_CHANGE, BI.Events.TOGGLE);
+                        }
+                    },
                     width: 24
                 }]
         });
@@ -114,7 +122,7 @@ BI.MultiSelectTrigger = BI.inherit(BI.Trigger, {
     /**
      * 重新调整numberCounter的空白占位符
      */
-    refreshPlaceHolderWidth: function(width) {
+    refreshPlaceHolderWidth: function (width) {
         this.wrapper.attr("items")[1].width = width;
         this.wrapper.resize();
     },
@@ -167,4 +175,4 @@ BI.MultiSelectTrigger.EVENT_BEFORE_COUNTER_POPUPVIEW = "EVENT_BEFORE_COUNTER_POP
 BI.MultiSelectTrigger.EVENT_BLUR = "EVENT_BLUR";
 BI.MultiSelectTrigger.EVENT_FOCUS = "EVENT_FOCUS";
 
-BI.shortcut("bi.multi_select_trigger", BI.MultiSelectTrigger);
\ No newline at end of file
+BI.shortcut("bi.multi_select_trigger", BI.MultiSelectTrigger);
diff --git a/src/widget/multitree/multi.tree.combo.js b/src/widget/multitree/multi.tree.combo.js
index 4e42df154..ec94374d8 100644
--- a/src/widget/multitree/multi.tree.combo.js
+++ b/src/widget/multitree/multi.tree.combo.js
@@ -22,7 +22,7 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
         var isInit = false;
         var want2showCounter = false;
 
-        this.storeValue = {value: o.value || {}};
+        this.storeValue = { value: o.value || {} };
 
         this.trigger = BI.createWidget({
             type: "bi.multi_select_trigger",
@@ -44,7 +44,7 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
                 type: "bi.multi_tree_searcher",
                 itemsCreator: o.itemsCreator
             },
-            value: {value: o.value || {}}
+            value: { value: o.value || {} }
         });
 
         this.combo = BI.createWidget({
@@ -105,10 +105,9 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
                 maxWidth: o.isNeedAdjustWidth ? "auto" : 500,
             },
             isNeedAdjustWidth: o.isNeedAdjustWidth,
-            value: {value: o.value || {}},
+            value: { value: o.value || {} },
             hideChecker: function (e) {
-                return triggerBtn.element.find(e.target).length === 0 &&
-                    self.numberCounter.element.find(e.target).length === 0;
+                return self.numberCounter.element.find(e.target).length === 0;
             }
         });
 
@@ -131,12 +130,12 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
         });
 
         this.trigger.on(BI.MultiSelectTrigger.EVENT_START, function () {
-            self.storeValue = {value: self.combo.getValue()};
+            self.storeValue = { value: self.combo.getValue() };
             this.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
         });
         this.trigger.on(BI.MultiSelectTrigger.EVENT_STOP, function () {
-            self.storeValue = {value: this.getValue()};
+            self.storeValue = { value: this.getValue() };
             self.combo.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
             BI.nextTick(function () {
@@ -151,11 +150,11 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
             self.fireEvent(BI.MultiTreeCombo.EVENT_SEARCHING);
         });
 
-        function showCounter () {
+        function showCounter() {
             if (isSearching()) {
-                self.storeValue = {value: self.trigger.getValue()};
+                self.storeValue = { value: self.trigger.getValue() };
             } else if (isPopupView()) {
-                self.storeValue = {value: self.combo.getValue()};
+                self.storeValue = { value: self.combo.getValue() };
             }
             self.trigger.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
@@ -174,7 +173,7 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
             var checked = this.getSearcher().hasChecked();
             var val = {
                 type: BI.Selection.Multi,
-                value: checked ? {1: 1} : {}
+                value: checked ? { 1: 1 } : {}
             };
             this.getSearcher().setState(checked ? BI.Selection.Multi : BI.Selection.None);
             self.numberCounter.setButtonChecked(val);
@@ -186,7 +185,7 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
                 return;
             }
             if (change === true) {
-                self.storeValue = {value: self.combo.getValue()};
+                self.storeValue = { value: self.combo.getValue() };
                 change = false;
             }
             self.combo.setValue(self.storeValue);
@@ -201,9 +200,9 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
             } else {
                 if (isPopupView()) {
                     self._stopEditing();
-                    self.storeValue = {value: self.combo.getValue()};
+                    self.storeValue = { value: self.combo.getValue() };
                     if (clear === true) {
-                        self.storeValue = {value: {}};
+                        self.storeValue = { value: {} };
                     }
                     self.fireEvent(BI.MultiTreeCombo.EVENT_CONFIRM);
                 }
@@ -212,21 +211,6 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
             change = false;
         });
 
-        var triggerBtn = BI.createWidget({
-            type: "bi.trigger_icon_button",
-            width: o.height,
-            height: o.height,
-            cls: "multi-select-trigger-icon-button"
-        });
-        triggerBtn.on(BI.TriggerIconButton.EVENT_CHANGE, function () {
-            self.numberCounter.hideView();
-            if (self.combo.isViewVisible()) {
-                self.combo.hideView();
-            } else {
-                self.combo.showView();
-            }
-        });
-
         this.numberCounter = BI.createWidget({
             type: "bi.multi_select_check_selected_switcher",
             el: {
@@ -245,7 +229,7 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
             },
             itemsCreator: o.itemsCreator,
             valueFormatter: o.valueFormatter,
-            value: {value: o.value || {}}
+            value: { value: o.value || {} }
         });
         this.numberCounter.on(BI.MultiSelectCheckSelectedSwitcher.EVENT_TRIGGER_CHANGE, function () {
             if (!self.combo.isViewVisible()) {
@@ -289,11 +273,6 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
                 right: 0,
                 top: 0,
                 bottom: 0
-            }, {
-                el: triggerBtn,
-                right: 0,
-                top: 0,
-                bottom: 0
             }, {
                 el: {
                     type: "bi.vertical_adapt",
@@ -306,7 +285,7 @@ BI.MultiTreeCombo = BI.inherit(BI.Single, {
         });
     },
 
-    _stopEditing: function() {
+    _stopEditing: function () {
         this.trigger.stopEditing();
         this.numberCounter.hideView();
     },
diff --git a/src/widget/multitree/multi.tree.insert.combo.js b/src/widget/multitree/multi.tree.insert.combo.js
index 9694b3556..9823b37a7 100644
--- a/src/widget/multitree/multi.tree.insert.combo.js
+++ b/src/widget/multitree/multi.tree.insert.combo.js
@@ -23,7 +23,7 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
         var isInit = false;
         var want2showCounter = false;
 
-        this.storeValue = {value: o.value || {}};
+        this.storeValue = { value: o.value || {} };
 
         this.trigger = BI.createWidget({
             type: "bi.multi_select_trigger",
@@ -59,7 +59,7 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
                     }]
                 }
             },
-            value: {value: o.value || {}}
+            value: { value: o.value || {} }
 
         });
 
@@ -121,10 +121,9 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
                 maxWidth: o.isNeedAdjustWidth ? "auto" : 500,
             },
             isNeedAdjustWidth: o.isNeedAdjustWidth,
-            value: {value: o.value || {}},
+            value: { value: o.value || {} },
             hideChecker: function (e) {
-                return triggerBtn.element.find(e.target).length === 0 &&
-                    self.numberCounter.element.find(e.target).length === 0;
+                return self.numberCounter.element.find(e.target).length === 0;
             }
         });
 
@@ -147,12 +146,12 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
         });
 
         this.trigger.on(BI.MultiSelectTrigger.EVENT_START, function () {
-            self.storeValue = {value: self.combo.getValue()};
+            self.storeValue = { value: self.combo.getValue() };
             this.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
         });
         this.trigger.on(BI.MultiSelectTrigger.EVENT_STOP, function () {
-            self.storeValue = {value: this.getValue()};
+            self.storeValue = { value: this.getValue() };
             self.combo.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
             BI.nextTick(function () {
@@ -167,11 +166,11 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
             self.fireEvent(BI.MultiTreeInsertCombo.EVENT_SEARCHING);
         });
 
-        function showCounter () {
+        function showCounter() {
             if (isSearching()) {
-                self.storeValue = {value: self.trigger.getValue()};
+                self.storeValue = { value: self.trigger.getValue() };
             } else if (isPopupView()) {
-                self.storeValue = {value: self.combo.getValue()};
+                self.storeValue = { value: self.combo.getValue() };
             }
             self.trigger.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
@@ -185,7 +184,7 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
             var checked = this.getSearcher().hasChecked();
             var val = {
                 type: BI.Selection.Multi,
-                value: checked ? {1: 1} : {}
+                value: checked ? { 1: 1 } : {}
             };
             this.getSearcher().setState(checked ? BI.Selection.Multi : BI.Selection.None);
             self.numberCounter.setButtonChecked(val);
@@ -197,7 +196,7 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
                 return;
             }
             if (change === true) {
-                self.storeValue = {value: self.combo.getValue()};
+                self.storeValue = { value: self.combo.getValue() };
                 change = false;
             }
             self.combo.setValue(self.storeValue);
@@ -212,9 +211,9 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
             } else {
                 if (isPopupView()) {
                     self._stopEditing();
-                    self.storeValue = {value: self.combo.getValue()};
+                    self.storeValue = { value: self.combo.getValue() };
                     if (clear === true) {
-                        self.storeValue = {value: {}};
+                        self.storeValue = { value: {} };
                     }
                     self.fireEvent(BI.MultiTreeInsertCombo.EVENT_CONFIRM);
                 }
@@ -223,21 +222,6 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
             change = false;
         });
 
-        var triggerBtn = BI.createWidget({
-            type: "bi.trigger_icon_button",
-            width: o.height,
-            height: o.height,
-            cls: "multi-select-trigger-icon-button"
-        });
-        triggerBtn.on(BI.TriggerIconButton.EVENT_CHANGE, function () {
-            self.numberCounter.hideView();
-            if (self.combo.isViewVisible()) {
-                self.combo.hideView();
-            } else {
-                self.combo.showView();
-            }
-        });
-
         this.numberCounter = BI.createWidget({
             type: "bi.multi_select_check_selected_switcher",
             el: {
@@ -300,11 +284,6 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
                 right: 0,
                 top: 0,
                 bottom: 0
-            }, {
-                el: triggerBtn,
-                right: 0,
-                top: 0,
-                bottom: 0
             }, {
                 el: {
                     type: "bi.vertical_adapt",
@@ -322,7 +301,7 @@ BI.MultiTreeInsertCombo = BI.inherit(BI.Single, {
         this.numberCounter.setButtonChecked(this.storeValue);
     },
 
-    _stopEditing: function() {
+    _stopEditing: function () {
         this.trigger.stopEditing();
         this.numberCounter.hideView();
     },
diff --git a/src/widget/multitree/multi.tree.list.combo.js b/src/widget/multitree/multi.tree.list.combo.js
index ff5a2864a..2a378b1ae 100644
--- a/src/widget/multitree/multi.tree.list.combo.js
+++ b/src/widget/multitree/multi.tree.list.combo.js
@@ -23,7 +23,7 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
         var isInit = false;
         var want2showCounter = false;
 
-        this.storeValue = {value: o.value || []};
+        this.storeValue = { value: o.value || [] };
 
         this.trigger = BI.createWidget({
             type: "bi.multi_select_trigger",
@@ -74,7 +74,7 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
                     itemsCreator: o.itemsCreator
                 }
             },
-            value: {value: o.value || {}}
+            value: { value: o.value || {} }
 
         });
 
@@ -139,10 +139,9 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
                 maxWidth: o.isNeedAdjustWidth ? "auto" : 500,
             },
             isNeedAdjustWidth: o.isNeedAdjustWidth,
-            value: {value: o.value || {}},
+            value: { value: o.value || {} },
             hideChecker: function (e) {
-                return triggerBtn.element.find(e.target).length === 0 &&
-                    self.numberCounter.element.find(e.target).length === 0;
+                return self.numberCounter.element.find(e.target).length === 0;
             }
         });
 
@@ -165,12 +164,12 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
         });
 
         this.trigger.on(BI.MultiSelectTrigger.EVENT_START, function () {
-            self.storeValue = {value: self.combo.getValue()};
+            self.storeValue = { value: self.combo.getValue() };
             this.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
         });
         this.trigger.on(BI.MultiSelectTrigger.EVENT_STOP, function () {
-            self.storeValue = {value: this.getValue()};
+            self.storeValue = { value: this.getValue() };
             self.combo.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
             BI.nextTick(function () {
@@ -185,11 +184,11 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
             self.fireEvent(BI.MultiTreeListCombo.EVENT_SEARCHING);
         });
 
-        function showCounter () {
+        function showCounter() {
             if (isSearching()) {
-                self.storeValue = {value: self.trigger.getValue()};
+                self.storeValue = { value: self.trigger.getValue() };
             } else if (isPopupView()) {
-                self.storeValue = {value: self.combo.getValue()};
+                self.storeValue = { value: self.combo.getValue() };
             }
             self.trigger.setValue(self.storeValue);
             self.numberCounter.setValue(self.storeValue);
@@ -203,7 +202,7 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
             var checked = this.getSearcher().hasChecked();
             var val = {
                 type: BI.Selection.Multi,
-                value: checked ? {1: 1} : {}
+                value: checked ? { 1: 1 } : {}
             };
             this.getSearcher().setState(checked ? BI.Selection.Multi : BI.Selection.None);
             self.numberCounter.setButtonChecked(val);
@@ -215,7 +214,7 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
                 return;
             }
             if (change === true) {
-                self.storeValue = {value: self.combo.getValue()};
+                self.storeValue = { value: self.combo.getValue() };
                 change = false;
             }
             self.combo.setValue(self.storeValue);
@@ -230,9 +229,9 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
             } else {
                 if (isPopupView()) {
                     self._stopEditing();
-                    self.storeValue = {value: self.combo.getValue()};
+                    self.storeValue = { value: self.combo.getValue() };
                     if (clear === true) {
-                        self.storeValue = {value: []};
+                        self.storeValue = { value: [] };
                     }
                     self.fireEvent(BI.MultiTreeListCombo.EVENT_CONFIRM);
                 }
@@ -241,21 +240,6 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
             change = false;
         });
 
-        var triggerBtn = BI.createWidget({
-            type: "bi.trigger_icon_button",
-            width: o.height,
-            height: o.height,
-            cls: "multi-select-trigger-icon-button"
-        });
-        triggerBtn.on(BI.TriggerIconButton.EVENT_CHANGE, function () {
-            self.numberCounter.hideView();
-            if (self.combo.isViewVisible()) {
-                self.combo.hideView();
-            } else {
-                self.combo.showView();
-            }
-        });
-
         this.numberCounter = BI.createWidget({
             type: "bi.multi_select_check_selected_switcher",
             el: {
@@ -318,11 +302,6 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
                 right: 0,
                 top: 0,
                 bottom: 0
-            }, {
-                el: triggerBtn,
-                right: 0,
-                top: 0,
-                bottom: 0
             }, {
                 el: {
                     type: "bi.vertical_adapt",
@@ -340,7 +319,7 @@ BI.MultiTreeListCombo = BI.inherit(BI.Single, {
         this.numberCounter.setButtonChecked(this.storeValue);
     },
 
-    _stopEditing: function() {
+    _stopEditing: function () {
         this.trigger.stopEditing();
         this.numberCounter.hideView();
     },