diff --git a/src/views/modules/haianAutoWarehouse/haianPalletPacking.vue b/src/views/modules/haianAutoWarehouse/haianPalletPacking.vue
index b8565d4..71bceda 100644
--- a/src/views/modules/haianAutoWarehouse/haianPalletPacking.vue
+++ b/src/views/modules/haianAutoWarehouse/haianPalletPacking.vue
@@ -74,10 +74,10 @@
           </div>
         </div>
 
-        <!-- 海安组盘高度必须由现场选择，提交时随托盘保存并传给WCS - rqrq -->
+        <!-- 海安组盘高度选填；已选值随请求保存并传给WCS，未选时由后端复用托盘高度或默认档位 - rqrq -->
         <div v-if="palletScanned" class="input-group">
           <label class="input-label">托盘高度</label>
-          <el-select v-model="currentHeight" placeholder="请选择托盘高度" style="width: 100%;" :disabled="interfaceBusy">
+          <el-select v-model="currentHeight" placeholder="请选择托盘高度（可选）" clearable style="width: 100%;" :disabled="interfaceBusy">
             <el-option v-for="item in heightOptions" :key="item.value" :label="item.label" :value="item.value" />
           </el-select>
         </div>
@@ -1186,10 +1186,6 @@ export default {
         return
       }
       // 栈板未绑定当前库位时禁止手工触发运输入库，避免无站点上下文误发请求 - rqrq
-      if (!this.currentHeight) {
-        this.$alert('请选择托盘高度', '提示', { confirmButtonText: '确定' })
-        return
-      }
       if (!this.currentPalletStation || !this.currentPalletStation.trim()) {
         this.$alert('当前栈板没有库位，不允许执行运输入库', '提示', { confirmButtonText: '确定' })
         return
@@ -1213,6 +1209,7 @@ export default {
       callPalletToStationWithUpdateZuPan({
         site: this.site,
         palletId: this.palletCode,
+        // 高度选填，空值由后端优先复用托盘已保存高度，无保存值时按默认档位下发 - rqrq
         height: this.currentHeight,
         startStation: this.palletInfo.locationCode || ''
       }).then(({ data }) => {