diff --git a/package.json b/package.json
index 360cb161b..45b3d3453 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fineui",
-  "version": "2.0.20221214104244",
+  "version": "2.0.20221214115751",
   "description": "fineui",
   "main": "dist/fineui_without_conflict.min.js",
   "types": "dist/lib/index.d.ts",
diff --git a/src/base/combination/combo.js b/src/base/combination/combo.js
index c937f8f84..f73fec11d 100644
--- a/src/base/combination/combo.js
+++ b/src/base/combination/combo.js
@@ -38,9 +38,9 @@
                 adjustLength: 0, // 调整的距离
                 adjustXOffset: 0,
                 adjustYOffset: 0,
-                supportCSSTransform: false,
+                supportCSSTransform: true,
                 hideChecker: BI.emptyFn,
-                offsetStyle: "left", // left,right,center
+                offsetStyle: "", // "",center,middle
                 el: {},
                 popup: {},
                 comboClass: "bi-combo-popup",
@@ -308,10 +308,10 @@
                 var scaleX = positonedRect.width / positionRelativeElement.offsetWidth;
                 var scaleY = positonedRect.height / positionRelativeElement.offsetHeight;
 
-                p.top && (p.top = p.top / scaleY);
-                p.left && (p.left = p.left / scaleX);
+                p.top && (p.top = Math.round(p.top / scaleY));
+                p.left && (p.left = Math.round(p.left / scaleX));
 
-                p.adaptHeight && (p.adaptHeight = p.adaptHeight / scaleY);
+                p.adaptHeight && (p.adaptHeight = Math.round(p.adaptHeight / scaleY));
             }
 
             if ("adaptHeight" in p) {
diff --git a/src/core/platform/web/dom.js b/src/core/platform/web/dom.js
index 17dd9d479..203683297 100644
--- a/src/core/platform/web/dom.js
+++ b/src/core/platform/web/dom.js
@@ -433,17 +433,18 @@
             };
         },
 
-        getCenterAdaptPosition: function (combo, popup) {
-            var comboOffset = combo.element.offset();
-            var comboBounds = combo.element.bounds(), popupBounds = popup.element.bounds(),
-                windowBounds = BI.Widget._renderEngine.createElement("body").bounds();
+        getCenterAdaptPosition: function (combo, popup, positionRelativeElement) {
+            var comboRect = combo.element[0].getBoundingClientRect(),
+                popupRect = popup.element[0].getBoundingClientRect(),
+                positionRelativeElementRect = positionRelativeElement.getBoundingClientRect(),
+                viewportBounds = document.documentElement.getBoundingClientRect();
             var left;
-            if (comboOffset.left + comboBounds.width / 2 + popupBounds.width / 2 > windowBounds.width) {
-                left = windowBounds.width - popupBounds.width;
+            if (comboRect.left + comboRect.width / 2 + popupRect.width / 2 > viewportBounds.width) {
+                left = viewportBounds.width - comboRect.width - positionRelativeElementRect.left;
             } else {
-                left = comboOffset.left + comboBounds.width / 2 - popupBounds.width / 2;
+                left = comboRect.left + (comboRect.width - popupRect.width) / 2 - positionRelativeElementRect.left;
             }
-            if (left < 0) {
+            if (left + positionRelativeElementRect.left < 0) {
                 left = 0;
             }
             return {
@@ -451,17 +452,19 @@
             };
         },
 
-        getMiddleAdaptPosition: function (combo, popup) {
-            var comboOffset = combo.element.offset();
-            var comboBounds = combo.element.bounds(), popupBounds = popup.element.bounds(),
-                windowBounds = BI.Widget._renderEngine.createElement("body").bounds();
+        getMiddleAdaptPosition: function (combo, popup, positionRelativeElement) {
+            var comboRect = combo.element[0].getBoundingClientRect(),
+                popupRect = popup.element[0].getBoundingClientRect(),
+                positionRelativeElementRect = positionRelativeElement.getBoundingClientRect(),
+                viewportBounds = document.documentElement.getBoundingClientRect();
+
             var top;
-            if (comboOffset.top + comboBounds.height / 2 + popupBounds.height / 2 > windowBounds.height) {
-                top = windowBounds.height - popupBounds.height;
+            if (comboRect.top + comboRect.height / 2 + popupRect.height / 2 > viewportBounds.height) {
+                top = viewportBounds.height - popupRect.height - positionRelativeElementRect.top;
             } else {
-                top = comboOffset.top + comboBounds.height / 2 - popupBounds.height / 2;
+                top = comboRect.top + (comboRect.height - popupRect.height) / 2 - positionRelativeElementRect.top;
             }
-            if (top < 0) {
+            if (top + positionRelativeElementRect.top < 0) {
                 top = 0;
             }
             return {
@@ -681,19 +684,19 @@
             switch (offsetStyle) {
                 case "center":
                     if (position.change) {
-                        var p = BI.DOM.getMiddleAdaptPosition(combo, popup);
+                        var p = BI.DOM.getMiddleAdaptPosition(combo, popup, positionRelativeElement);
                         position.top = p.top;
                     } else {
-                        var p = BI.DOM.getCenterAdaptPosition(combo, popup);
+                        var p = BI.DOM.getCenterAdaptPosition(combo, popup, positionRelativeElement);
                         position.left = p.left;
                     }
                     break;
                 case "middle":
                     if (position.change) {
-                        var p = BI.DOM.getCenterAdaptPosition(combo, popup);
+                        var p = BI.DOM.getCenterAdaptPosition(combo, popup, positionRelativeElement);
                         position.left = p.left;
                     } else {
-                        var p = BI.DOM.getMiddleAdaptPosition(combo, popup);
+                        var p = BI.DOM.getMiddleAdaptPosition(combo, popup, positionRelativeElement);
                         position.top = p.top;
                     }
                     break;