diff --git a/changelog.md b/changelog.md
index e92247d0c..74d3a0360 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,4 +1,6 @@
 # 更新日志
+2.0(2021-10)
+- combo增加window.blur事件触发隐藏
 2.0(2021-09)
 - 支持自动watch
 - 支持h函数传递left、right，优化left_right_vertical_adapt布局的jsx写法
diff --git a/src/base/combination/combo.js b/src/base/combination/combo.js
index 7ca9267d8..881480a84 100644
--- a/src/base/combination/combo.js
+++ b/src/base/combination/combo.js
@@ -310,6 +310,7 @@
             delete needHideWhenAnotherComboOpen[this.getName()];
 
             BI.Widget._renderEngine.createElement(document).unbind("mousedown." + this.getName()).unbind("mousewheel." + this.getName());
+            BI.Widget._renderEngine.createElement(window).unbind("blur." + this.getName());
             this.fireEvent(BI.Combo.EVENT_AFTER_HIDEVIEW);
         },
 
@@ -333,7 +334,10 @@
 
             this.element.addClass(this.options.comboClass);
             BI.Widget._renderEngine.createElement(document).unbind("mousedown." + this.getName()).unbind("mousewheel." + this.getName());
+            BI.Widget._renderEngine.createElement(window).unbind("blur." + this.getName());
+
             BI.Widget._renderEngine.createElement(document).bind("mousedown." + this.getName(), BI.bind(this._hideIf, this)).bind("mousewheel." + this.getName(), BI.bind(this._hideIf, this));
+            BI.Widget._renderEngine.createElement(window).bind("blur." + this.getName(), BI.bind(this._hideIf, this));
             this.fireEvent(BI.Combo.EVENT_AFTER_POPUPVIEW);
         },
 
@@ -555,7 +559,8 @@
                 .unbind("mousewheel." + this.getName())
                 .unbind("mouseenter." + this.getName())
                 .unbind("mousemove." + this.getName())
-                .unbind("mouseleave." + this.getName())
+                .unbind("mouseleave." + this.getName());
+            BI.Widget._renderEngine.createElement(window)
                 .unbind("blur." + this.getName());
             BI.Resizers.remove(this.getName());
             this.popupView && this.popupView._destroy();
diff --git a/src/less/base/single/input/checkbox.less b/src/less/base/single/input/checkbox.less
index f3d0c15b5..96507bfd2 100644
--- a/src/less/base/single/input/checkbox.less
+++ b/src/less/base/single/input/checkbox.less
@@ -15,6 +15,7 @@
       border-left: 0;
       width: 6px;
       height: 9px;
+      .box-sizing(border-box);
       .transform(rotate(45deg) scale(1) translate(-50%, -50%));
       content: '';
     }