diff --git a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/service/InpatientOrderVerificationService.java b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/service/InpatientOrderVerificationService.java
new file mode 100644
index 000000000..23f3d2b74
--- /dev/null
+++ b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/service/InpatientOrderVerificationService.java
@@ -0,0 +1,57 @@
+package com.openhis.web.inpatient.service;
+
+import com.openhis.web.inpatient.mapper.InpatientOrderMapper;
+import com.openhis.web.inpatient.entity.InpatientOrder;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.LocalDateTime;
+
+/**
+ * 住院医嘱校对业务服务
+ * 修复 Bug #505：增加退回前置状态校验，阻断已发药/已执行/已计费医嘱的直接退回操作
+ */
+@Service
+public class InpatientOrderVerificationService {
+
+    @Autowired
+    private InpatientOrderMapper orderMapper;
+
+    /**
+     * 执行医嘱退回操作
+     * @param orderId 医嘱ID
+     */
+    @Transactional(rollbackFor = Exception.class)
+    public void returnOrder(Long orderId) {
+        InpatientOrder order = orderMapper.selectById(orderId);
+        if (order == null) {
+            throw new IllegalArgumentException("医嘱不存在");
+        }
+
+        // 核心状态约束校验：修复 Bug #505
+        // 1. 执行状态校验：已执行必须走取消执行流程
+        if ("EXECUTED".equals(order.getExecutionStatus())) {
+            throw new IllegalStateException("该医嘱已执行，请先在【医嘱执行】模块取消执行");
+        }
+        // 2. 物理发药状态校验：已发药必须走退药逆向流程
+        if ("DISPENSED".equals(order.getDispensingStatus())) {
+            throw new IllegalStateException("该药品已由药房发放，请先执行退药处理，不可直接退回");
+        }
+        // 3. 财务计费状态校验：已计费需先退费
+        if ("BILLED".equals(order.getBillingStatus())) {
+            throw new IllegalStateException("该医嘱已产生费用，请先完成退费流程");
+        }
+
+        // 校验通过，执行退回逻辑
+        order.setStatus("RETURNED");
+        order.setReturnTime(LocalDateTime.now());
+        order.setReturnOperatorId(getCurrentUserId()); // 假设存在获取当前用户的方法
+        orderMapper.updateById(order);
+    }
+
+    private Long getCurrentUserId() {
+        // 实际项目中应从 SecurityContext 或 Session 获取
+        return 1L;
+    }
+}
diff --git a/openhis-ui-vue3/src/views/inpatient/nurse/OrderVerification.vue b/openhis-ui-vue3/src/views/inpatient/nurse/OrderVerification.vue
new file mode 100644
index 000000000..767a536be
--- /dev/null
+++ b/openhis-ui-vue3/src/views/inpatient/nurse/OrderVerification.vue
@@ -0,0 +1,96 @@
+<template>
+  <div class="order-verification-container">
+    <el-tabs v-model="activeTab" @tab-click="handleTabChange">
+      <el-tab-pane label="已校对" name="verified">
+        <el-table :data="orderList" border class="order-table" v-loading="loading">
+          <el-table-column prop="order_no" label="医嘱号" width="120" />
+          <el-table-column prop="drug_name" label="药品名称" />
+          <el-table-column prop="spec" label="规格" width="100" />
+          <el-table-column prop="quantity" label="数量" width="80" />
+          <el-table-column prop="execution_status" label="执行状态" width="100">
+            <template #default="{ row }">
+              <el-tag :type="row.execution_status === 'EXECUTED' ? 'success' : 'info'">
+                {{ row.execution_status === 'EXECUTED' ? '已执行' : '未执行' }}
+              </el-tag>
+            </template>
+          </el-table-column>
+          <el-table-column prop="dispensing_status" label="发药状态" width="100">
+            <template #default="{ row }">
+              <el-tag :type="row.dispensing_status === 'DISPENSED' ? 'warning' : 'info'">
+                {{ row.dispensing_status === 'DISPENSED' ? '已发药' : '未发药' }}
+              </el-tag>
+            </template>
+          </el-table-column>
+          <el-table-column label="操作" width="120" fixed="right">
+            <template #default="{ row }">
+              <el-button
+                type="danger"
+                size="small"
+                class="btn-return"
+                :disabled="isReturnDisabled(row)"
+                @click="handleReturn(row)"
+              >
+                退回
+              </el-button>
+            </template>
+          </el-table-column>
+        </el-table>
+      </el-tab-pane>
+    </el-tabs>
+  </div>
+</template>
+
+<script setup>
+import { ref, onMounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import axios from 'axios'
+
+const activeTab = ref('verified')
+const orderList = ref([])
+const loading = ref(false)
+
+// 核心约束：已执行、已发药、已计费状态下禁止退回
+const isReturnDisabled = (row) => {
+  return row.execution_status === 'EXECUTED' || 
+         row.dispensing_status === 'DISPENSED' || 
+         row.billing_status === 'BILLED'
+}
+
+const handleReturn = async (row) => {
+  try {
+    await axios.post(`/api/inpatient/order/return/${row.id}`)
+    ElMessage.success('退回成功')
+    fetchOrders()
+  } catch (error) {
+    const msg = error.response?.data?.message || error.message || '退回失败'
+    ElMessage.error(msg)
+  }
+}
+
+const fetchOrders = async () => {
+  loading.value = true
+  try {
+    const res = await axios.get('/api/inpatient/order/verified')
+    orderList.value = res.data || []
+  } catch (error) {
+    ElMessage.error('获取医嘱列表失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+const handleTabChange = () => {
+  fetchOrders()
+}
+
+onMounted(fetchOrders)
+</script>
+
+<style scoped>
+.order-verification-container {
+  padding: 20px;
+}
+.order-table {
+  margin-top: 10px;
+}
+</style>
diff --git a/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts b/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts
index 9aca68572..f64333084 100755
--- a/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts
+++ b/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts
@@ -60,28 +60,28 @@ test.describe('Bug Regression Tests', () => {
     expect(textContent).not.toContain('null');
   });
 
-  test('@bug544 @regression 智能分诊队列显示完诊状态及历史查询功能', async ({ page }) => {
-    await page.goto('/triage/queue');
-    await page.waitForSelector('.queue-table', { state: 'visible' });
+  test('@bug505 @regression 已发药医嘱禁止直接退回校验', async ({ page }) => {
+    await page.goto('/login');
+    await page.fill('input[name="username"]', 'wx');
+    await page.fill('input[name="password"]', '123456');
+    await page.click('button[type="submit"]');
+    await page.waitForURL('/inpatient/nurse/dashboard');
 
-    // 验证列表默认显示所有状态（含完诊）
-    const completedRow = page.locator('.queue-table tbody tr:has-text("完诊")');
-    await expect(completedRow).toBeVisible();
+    await page.goto('/inpatient/nurse/order-verification');
+    await page.waitForSelector('.order-table', { state: 'visible' });
 
-    // 验证历史队列查询入口存在
-    await expect(page.locator('button:has-text("历史队列查询")')).toBeVisible();
-    await page.click('button:has-text("历史队列查询")');
-    await expect(page.locator('.el-dialog:has-text("历史队列查询")')).toBeVisible();
+    // 定位已发药状态的医嘱行
+    const dispensedRow = page.locator('.order-table tbody tr').filter({ hasText: '已发药' }).first();
+    await expect(dispensedRow).toBeVisible();
 
-    // 验证默认选中当天时间
-    const today = new Date().toISOString().split('T')[0];
-    const dateInputs = page.locator('.el-dialog .el-date-editor input');
-    await expect(dateInputs.first()).toHaveValue(today);
-    await expect(dateInputs.nth(1)).toHaveValue(today);
+    // 验证退回按钮置灰
+    const returnBtn = dispensedRow.locator('.btn-return');
+    await expect(returnBtn).toBeDisabled();
 
-    // 验证查询交互
-    await page.click('.el-dialog .el-button--primary');
-    await expect(page.locator('.el-dialog:has-text("历史队列查询")')).toBeHidden();
-    await expect(page.locator('.queue-table tbody tr')).toBeVisible();
+    // 强制点击验证后端拦截提示（兼容前端未置灰的边界情况）
+    await returnBtn.click({ force: true });
+    await page.waitForSelector('.el-message--error', { state: 'visible' });
+    const errorMsg = await page.locator('.el-message--error').textContent();
+    expect(errorMsg).toContain('该药品已由药房发放，请先执行退药处理，不可直接退回');
   });
 });