diff --git a/README.md b/README.md
index 463fb1e7..dd3d5cbd 100644
--- a/README.md
+++ b/README.md
@@ -270,7 +270,7 @@ Set fixed time list to select;
 | --------------- | ---------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------ |
 | input           | When the value change(v-model event)                                               | date                                                                                                                     |
 | change          | When the value change(same as input)                                               | date, type('date'\|'hour'\|'minute'\|'second'\|'ampm                                                                     |
-| open            | When panel opening                                                                 |                                                                                                                          |
+| open            | When panel opening                                                                 | event                                                                                                                         |
 | close           | When panel closing                                                                 |                                                                                                                          |
 | confirm         | When click 'confirm' button                                                        | date                                                                                                                     |
 | clear           | When click 'clear' button                                                          |                                                                                                                          |
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 903aa263..5c29a226 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -267,7 +267,7 @@ data() {
 | --------------- | ------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------ |
 | input           | 当选择日期的事件触发                                                           | date                                                                                                                     |
 | change          | 当选择日期的事件触发                                                           | date, type('date'\|'hour'\|'minute'\|'second'\|'ampm                                                                     |
-| open            | 当弹出层打开时候                                                               |                                                                                                                          |
+| open            | 当弹出层打开时候                                                               | event                                                                                                                    |
 | close           | 当弹出层关闭时候                                                               |                                                                                                                          |
 | confirm         | 当点击确认按钮                                                                 | date                                                                                                                     |
 | clear           | 当点击清除按钮                                                                 |                                                                                                                          |
diff --git a/src/date-picker.vue b/src/date-picker.vue
index 1d138d66..b299c860 100644
--- a/src/date-picker.vue
+++ b/src/date-picker.vue
@@ -399,10 +399,10 @@ export default {
         }
       }
     },
-    openPopup() {
+    openPopup(evt) {
       if (this.popupVisible) return;
       this.defaultOpen = true;
-      this.$emit('open');
+      this.$emit('open', evt);
       this.$emit('update:open', true);
     },
     closePopup() {
@@ -459,7 +459,7 @@ export default {
       this.$emit('blur', evt);
     },
     handleInputFocus(evt) {
-      this.openPopup();
+      this.openPopup(evt);
       this.$emit('focus', evt);
     },
     hasSlot(name) {