diff --git a/packages/menu/src/menu.vue b/packages/menu/src/menu.vue
index 0dd63ed7e0..39e7817b2a 100644
--- a/packages/menu/src/menu.vue
+++ b/packages/menu/src/menu.vue
@@ -165,7 +165,10 @@
         this.openedMenus.push(index);
       },
       closeMenu(index) {
-        this.openedMenus.splice(this.openedMenus.indexOf(index), 1);
+        const i = this.openedMenus.indexOf(index);
+        if (i !== -1) {
+          this.openedMenus.splice(i, 1);
+        }
       },
       handleSubmenuClick(submenu) {
         const { index, indexPath } = submenu;
diff --git a/packages/theme-default/src/menu.css b/packages/theme-default/src/menu.css
index 7e784676c9..8a4f1f39ab 100644
--- a/packages/theme-default/src/menu.css
+++ b/packages/theme-default/src/menu.css
@@ -160,6 +160,10 @@
         }
       }
 
+      .el-menu .el-submenu {
+        min-width: 200px;
+      }
+
       .el-submenu {
         position: relative;
         & .el-menu {