修改

src/components/tradePavilion/plugin/dropdown.vue

@@ -13,7 +13,7 @@
         <el-form label-width="90px">
           <el-form-item :label="searchData.CompData.Name" :required="searchData.CompData.IsRequire"
             style="margin-bottom:0">
-            <el-select v-model="defaultValue" style="width:328px;">
+            <el-select v-model="defaultValue" style="width:328px;" :popper-append-to-body="false">
               <el-option v-for="item in searchData.CompData.OptionList" :key="item.Id" :label="item.Name"
                 :value="item.Id">
               </el-option>