修改

src/assets/css/global.css

@@ -70,4 +70,12 @@ a {
     top: 100px;
     bottom: unset;
    
-} */
+} */
+
+.el-cascader-panel {
+    height: 195px;
+    .el-scrollbar__wrap {
+      height: 100%;
+      overflow-x: auto;
+    }
+  }