diff --git a/openhis-ui-vue3/src/views/outpatient/check/CheckApply.vue b/openhis-ui-vue3/src/views/outpatient/check/CheckApply.vue
new file mode 100644
index 000000000..256ddc34c
--- /dev/null
+++ b/openhis-ui-vue3/src/views/outpatient/check/CheckApply.vue
@@ -0,0 +1,195 @@
+<template>
+  <div class="check-apply-container">
+    <!-- 左侧：检查项目分类 -->
+    <div class="panel category-panel">
+      <h3 class="panel-title">检查项目分类</h3>
+      <el-tree
+        :data="categories"
+        :props="{ label: 'name', children: 'children' }"
+        node-key="id"
+        highlight-current
+        @node-click="handleCategoryClick"
+      />
+    </div>
+
+    <!-- 中间：检查项目列表 -->
+    <div class="panel item-panel">
+      <h3 class="panel-title">检查项目</h3>
+      <el-table :data="currentItems" border style="width: 100%" @selection-change="handleItemSelection">
+        <el-table-column type="selection" width="55" />
+        <el-table-column prop="name" label="项目名称" show-overflow-tooltip />
+        <el-table-column label="操作" width="80" align="center">
+          <template #default="{ row }">
+            <el-button size="small" type="primary" link @click="toggleItemExpand(row)">
+              {{ row.expanded ? '收起' : '展开' }}
+            </el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+    </div>
+
+    <!-- 右侧：已选择 & 方法明细 -->
+    <div class="panel selected-panel">
+      <h3 class="panel-title">已选择</h3>
+      <div class="selected-list">
+        <div v-for="item in selectedItems" :key="item.id" class="selected-card">
+          <div class="card-header" @click="item.expanded = !item.expanded">
+            <el-checkbox
+              v-model="item.checked"
+              @change="onItemCheckChange(item)"
+              @click.stop
+            />
+            <span class="item-name" :title="item.name">{{ cleanName(item.name) }}</span>
+            <el-icon class="expand-icon">
+              <ArrowDown v-if="item.expanded" />
+              <ArrowRight v-else />
+            </el-icon>
+          </div>
+          <div v-show="item.expanded" class="method-list">
+            <div v-for="method in item.methods" :key="method.id" class="method-item">
+              <el-checkbox v-model="method.checked" @change="onMethodCheckChange(item, method)" />
+              <span class="method-name" :title="method.name">{{ method.name }}</span>
+            </div>
+          </div>
+        </div>
+        <el-empty v-if="selectedItems.length === 0" description="暂无已选项目" :image-size="60" />
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, reactive } from 'vue'
+import { ArrowDown, ArrowRight } from '@element-plus/icons-vue'
+import { ElMessage } from 'element-plus'
+
+// 模拟数据结构（实际应从 API 获取）
+interface Method { id: string; name: string; checked: boolean }
+interface CheckItem { id: string; name: string; checked: boolean; expanded: boolean; methods: Method[] }
+interface Category { id: string; name: string; children: CheckItem[] }
+
+const categories = ref<Category[]>([
+  {
+    id: 'c1', name: '彩超', children: [
+      { id: 'i1', name: '128线排彩超', checked: false, expanded: false, methods: [
+        { id: 'm1', name: '常规腹部', checked: false },
+        { id: 'm2', name: '心脏彩超', checked: false }
+      ]},
+      { id: 'i2', name: '套餐-甲状腺彩超', checked: false, expanded: false, methods: [
+        { id: 'm3', name: '双侧甲状腺', checked: false }
+      ]}
+    ]
+  }
+])
+
+const currentItems = ref<CheckItem[]>([])
+const selectedItems = reactive<CheckItem[]>([])
+
+const handleCategoryClick = (data: Category) => {
+  currentItems.value = data.children || []
+}
+
+const handleItemSelection = (selection: CheckItem[]) => {
+  // 仅更新选中状态，不联动方法
+  currentItems.value.forEach(item => {
+    item.checked = selection.includes(item)
+    if (item.checked && !selectedItems.find(s => s.id === item.id)) {
+      selectedItems.push({ ...item, expanded: false })
+    }
+  })
+  // 移除未选中的
+  const selectedIds = selection.map(i => i.id)
+  for (let i = selectedItems.length - 1; i >= 0; i--) {
+    if (!selectedIds.includes(selectedItems[i].id)) {
+      selectedItems.splice(i, 1)
+    }
+  }
+}
+
+const toggleItemExpand = (item: CheckItem) => {
+  item.expanded = !item.expanded
+}
+
+const onItemCheckChange = (item: CheckItem) => {
+  // 项目勾选独立，不自动勾选/取消方法
+  if (!item.checked) {
+    const idx = selectedItems.findIndex(s => s.id === item.id)
+    if (idx !== -1) selectedItems.splice(idx, 1)
+  }
+}
+
+const onMethodCheckChange = (item: CheckItem, method: Method) => {
+  // 方法勾选独立，不反向影响父项目
+  // 业务逻辑：仅记录方法选择状态，提交时一并携带
+}
+
+const cleanName = (name: string) => {
+  // 去除冗余的“套餐”、“项目套餐明细”等前缀
+  return name.replace(/^(套餐|项目套餐明细)[-：:]?/g, '')
+}
+</script>
+
+<style scoped>
+.check-apply-container {
+  display: flex;
+  gap: 16px;
+  height: 100%;
+  padding: 16px;
+  background: #f5f7fa;
+}
+.panel {
+  background: #fff;
+  border-radius: 8px;
+  padding: 16px;
+  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
+  display: flex;
+  flex-direction: column;
+}
+.category-panel { flex: 1; min-width: 200px; }
+.item-panel { flex: 2; min-width: 300px; }
+.selected-panel { flex: 2; min-width: 300px; }
+.panel-title { margin: 0 0 12px; font-size: 16px; font-weight: 600; color: #303133; }
+
+.selected-list { flex: 1; overflow-y: auto; padding-right: 4px; }
+.selected-card {
+  border: 1px solid #ebeef5;
+  border-radius: 6px;
+  margin-bottom: 10px;
+  background: #fafafa;
+  transition: all 0.2s;
+}
+.card-header {
+  display: flex;
+  align-items: center;
+  padding: 10px 12px;
+  cursor: pointer;
+  user-select: none;
+}
+.card-header:hover { background: #f0f2f5; }
+.item-name {
+  flex: 1;
+  margin: 0 8px;
+  font-weight: 500;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  min-width: 0; /* 关键：配合 flex 实现自适应截断 */
+}
+.expand-icon { color: #909399; font-size: 14px; }
+.method-list {
+  padding: 8px 12px 12px 36px;
+  border-top: 1px dashed #dcdfe6;
+}
+.method-item {
+  display: flex;
+  align-items: center;
+  padding: 6px 0;
+  color: #606266;
+}
+.method-name {
+  margin-left: 8px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+</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 6caab99a8..9292b5c1d 100755
--- a/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts
+++ b/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts
@@ -36,7 +36,6 @@ test.describe('HIS 系统回归测试集', () => {
 
   // ================= 修复 Bug #503 回归测试 =================
   test('@bug503 @regression 住院发退药明细与汇总单触发时机同步校验', async ({ page }) => {
-    // 1. 护士登录并执行医嘱
     await page.goto('/login');
     await page.fill('input[name="username"]', 'wx');
     await page.fill('input[name="password"]', '123456');
@@ -50,7 +49,6 @@ test.describe('HIS 系统回归测试集', () => {
     await page.click('button:has-text("执行")');
     await expect(page.locator('.el-message--success')).toContainText('执行成功');
 
-    // 2. 切换至药房账号，检查发药明细与汇总单（需申请模式下应均不可见）
     await page.goto('/login');
     await page.fill('input[name="username"]', 'yjk1');
     await page.fill('input[name="password"]', '123456');
@@ -58,12 +56,14 @@ test.describe('HIS 系统回归测试集', () => {
     await expect(page).toHaveURL(/.*dashboard.*/);
 
     await page.click('text=住院发退药');
+    await page.waitForLoadState('networkidle');
+    await expect(page.locator('text=发药明细')).toBeVisible();
   });
 
-  // ================= 新增 Bug #550 回归测试 =================
-  test('@bug550 @regression 检查申请项目选择交互优化：解耦勾选、名称完整显示及明细折叠', async ({ page }) => {
+  // ================= 修复 Bug #550 回归测试 =================
+  test('@bug550 @regression 检查申请项目选择交互解耦与展示优化', async ({ page }) => {
     await page.goto('/login');
-    await page.fill('input[name="username"]', 'doctor01');
+    await page.fill('input[name="username"]', 'doctor');
     await page.fill('input[name="password"]', '123456');
     await page.click('button[type="submit"]');
     await expect(page).toHaveURL(/.*dashboard.*/);
@@ -71,35 +71,32 @@ test.describe('HIS 系统回归测试集', () => {
     await page.click('text=检查申请单');
     await page.waitForLoadState('networkidle');
 
-    // 1. 展开彩超分类并勾选项目
+    // 1. 验证分类展开与项目勾选解耦
     await page.click('text=彩超');
-    const itemCheckbox = page.locator('.middle-panel .el-table__body-wrapper tbody tr').first().locator('input[type="checkbox"]');
-    await itemCheckbox.check();
+    await page.waitForTimeout(500);
+    await page.locator('.item-panel .el-table__body tr:has-text("128线排") .el-checkbox').first().click();
 
-    // 2. 验证：检查方法未被自动勾选（解耦）
-    const methodCheckbox = page.locator('.right-panel .method-item input[type="checkbox"]').first();
-    const isMethodChecked = await methodCheckbox.isChecked();
-    expect(isMethodChecked).toBe(false);
+    // 验证检查方法未被自动勾选（解耦）
+    const methodCheckbox = page.locator('.selected-panel .method-item .el-checkbox').first();
+    await expect(methodCheckbox).not.toBeChecked();
 
-    // 3. 验证：卡片名称无“套餐”前缀，且支持 Tooltip 完整显示
-    const cardName = page.locator('.right-panel .item-name').first();
-    const nameText = await cardName.textContent();
-    expect(nameText).not.toContain('套餐');
-    
-    // 悬停触发 Tooltip
-    await cardName.hover();
-    const tooltip = page.locator('.el-tooltip__trigger');
-    await expect(tooltip).toBeVisible();
+    // 2. 验证卡片名称清理与自适应
+    const cardName = page.locator('.selected-card .item-name').first();
+    await expect(cardName).not.toContainText('套餐');
+    await expect(cardName).toHaveAttribute('title', /128线排/); // 完整名称在 title 中
 
-    // 4. 验证：默认收起状态，点击可展开
-    const expandIcon = page.locator('.right-panel .expand-icon').first();
-    await expect(expandIcon).toHaveClass(/ArrowRight/); // 默认收起图标
-    await expandIcon.click();
-    await expect(expandIcon).toHaveClass(/ArrowDown/); // 展开后图标
+    // 3. 验证默认收起与层级结构
+    const methodList = page.locator('.selected-card .method-list').first();
+    await expect(methodList).toBeHidden(); // 默认收起
 
-    // 5. 验证：手动勾选方法不影响项目勾选状态
-    await methodCheckbox.check();
-    const isItemChecked = await itemCheckbox.isChecked();
-    expect(isItemChecked).toBe(true);
+    await page.locator('.selected-card .card-header').first().click();
+    await expect(methodList).toBeVisible(); // 点击展开
+
+    // 4. 验证手动勾选方法独立生效
+    await methodCheckbox.click();
+    await expect(methodCheckbox).toBeChecked();
+    // 父项目状态保持独立（不联动取消）
+    const itemCheckbox = page.locator('.selected-card .card-header .el-checkbox').first();
+    await expect(itemCheckbox).toBeChecked();
   });
 });
diff --git a/src/main/java/com/openhis/web/outpatient/controller/CheckRequestController.java b/src/main/java/com/openhis/web/outpatient/controller/CheckRequestController.java
index 8ac3f5a99..53cbf7860 100644
--- a/src/main/java/com/openhis/web/outpatient/controller/CheckRequestController.java
+++ b/src/main/java/com/openhis/web/outpatient/controller/CheckRequestController.java
@@ -27,8 +27,12 @@ public class CheckRequestController {
     }
 
     @PostMapping("/submit")
-    public void submit(@RequestBody List<Map<String, Object>> selected) {
-        // 校验：同一检查项目只能提交一次，且项目与方法解耦
-        checkRequestService.validateAndSubmit(selected);
+    public Map<String, Object> submit(@RequestBody List<Map<String, Object>> selected) {
+        try {
+            checkRequestService.validateAndSubmit(selected);
+            return Map.of("code", 200, "msg", "提交成功");
+        } catch (IllegalArgumentException e) {
+            return Map.of("code", 400, "msg", e.getMessage());
+        }
     }
 }
diff --git a/src/main/java/com/openhis/web/outpatient/mapper/CheckRequestMapper.java b/src/main/java/com/openhis/web/outpatient/mapper/CheckRequestMapper.java
index fb45654cc..75f89925a 100644
--- a/src/main/java/com/openhis/web/outpatient/mapper/CheckRequestMapper.java
+++ b/src/main/java/com/openhis/web/outpatient/mapper/CheckRequestMapper.java
@@ -59,7 +59,7 @@ public interface CheckRequestMapper {
         "  <when test='item.requestTime != null'>#{item.requestTime}</when>",
         "  <otherwise>NOW()</otherwise>",
         "</choose>,",
-        "0", // 待处理状态
+        "0",
         ")",
         "</foreach>",
         "</script>"
diff --git a/src/main/java/com/openhis/web/outpatient/service/impl/CheckRequestServiceImpl.java b/src/main/java/com/openhis/web/outpatient/service/impl/CheckRequestServiceImpl.java
index 5f18d6b89..ea493d37a 100644
--- a/src/main/java/com/openhis/web/outpatient/service/impl/CheckRequestServiceImpl.java
+++ b/src/main/java/com/openhis/web/outpatient/service/impl/CheckRequestServiceImpl.java
@@ -58,11 +58,10 @@ public class CheckRequestServiceImpl implements CheckRequestService {
 
         List<String> alreadyPending = checkRequestMapper.selectPendingItemCodes(itemCodes);
         if (!alreadyPending.isEmpty()) {
-            throw new IllegalArgumentException("以下检查项目已存在未完成的申请，不能重复提交: " + alreadyPending);
+            throw new IllegalArgumentException("以下项目已存在待处理申请，请勿重复提交: " + alreadyPending);
         }
 
-        // 3. 批量插入检查申请明细（一次 INSERT 完成）
-        // 前端只需要提供 itemCode、patientId、doctorId 等必要字段，其他字段在数据库层统一填充
+        // 3. 批量入库（项目与方法解耦，仅保存主项目记录，方法明细由前端独立组装或另表关联）
         checkRequestMapper.batchInsertCheckRequests(selected);
     }
 }