修改

src/components/mall.vue

@@ -269,7 +269,7 @@
 
   .mainContainer .main_routerPage {
     padding: 20px;
-    /* height:100%; */
+    overflow-y: scroll;
   }
 
 </style>
@@ -380,7 +380,7 @@
           </ul>
         </div>
       </div>
-      <div class="main_routerPage">
+      <div class="main_routerPage" :style="{minHeight: Height+'px'}">
         <router-view />
       </div>
     </div>
@@ -395,6 +395,7 @@
         showTwo: false,
         defaultActive: '1-1',
         currentUser: {},
+        Height:0,
         MenuList: [], //菜单列表
       };
     },
@@ -431,6 +432,11 @@
     },
     mounted() {
         this.getMenuList();
+        this.Height = document.documentElement.clientHeight - 60;
+        //监听浏览器窗口变化　
+        window.onresize = () => {
+          this.Height = document.documentElement.clientHeight - 60
+        }
     }
   };