diff --git a/src/directive/dialogDrag.js b/src/directive/dialogDrag.js
index 460884d6..c798679c 100644
--- a/src/directive/dialogDrag.js
+++ b/src/directive/dialogDrag.js
@@ -10,7 +10,7 @@ const dialogDrag = Vue.directive('dialogDrag', {
     dragDom.style.cssText += ';top:0px;'
 
     // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
-    const sty = (function() {
+    const sty = (function () {
       if (window.document.currentStyle) {
         return (dom, attr) => dom.currentStyle[attr]
       } else {
@@ -47,8 +47,10 @@ const dialogDrag = Vue.directive('dialogDrag', {
         styL = +styL.replace(/\px/g, '')
         styT = +styT.replace(/\px/g, '')
       }
+      const oldMousemove = document.onmousemove
 
-      document.onmousemove = function(e) {
+      document.onmousemove = function (e) {
+        oldMousemove(e)
         // 通过事件委托，计算移动的距离
         let left = e.clientX - disX
         const top = e.clientY - disY
@@ -70,8 +72,8 @@ const dialogDrag = Vue.directive('dialogDrag', {
         dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`
       }
 
-      document.onmouseup = function(e) {
-        document.onmousemove = null
+      document.onmouseup = function (e) {
+        document.onmousemove = oldMousemove
         document.onmouseup = null
       }
     }
diff --git a/src/utils/dialog.js b/src/utils/dialog.js
index fa9ddae5..0559b07d 100644
--- a/src/utils/dialog.js
+++ b/src/utils/dialog.js
@@ -40,8 +40,9 @@ Vue.directive('dialogDrag', {
         styL = +styL.replace(/\px/g, '')
         styT = +styT.replace(/\px/g, '')
       }
-
+      const oldMousemove = document.onmousemove
       document.onmousemove = function(e) {
+        oldMousemove(e)
         // 通过事件委托，计算移动的距离
         let left = e.clientX - disX
         let top = e.clientY - disY
@@ -63,7 +64,7 @@ Vue.directive('dialogDrag', {
       }
 
       document.onmouseup = function(e) {
-        document.onmousemove = null
+        document.onmousemove = oldMousemove
         document.onmouseup = null
       }
       return false