diff --git a/server/MiAssessment/src/MiAssessment.Admin/admin-web/src/api/business/distribution.ts b/server/MiAssessment/src/MiAssessment.Admin/admin-web/src/api/business/distribution.ts
index 27f608b..1550eed 100644
--- a/server/MiAssessment/src/MiAssessment.Admin/admin-web/src/api/business/distribution.ts
+++ b/server/MiAssessment/src/MiAssessment.Admin/admin-web/src/api/business/distribution.ts
@@ -41,7 +41,7 @@ export interface GenerateResult {
 }
 
 export interface AssignInviteCodesRequest {
-  codeIds: number[]
+  inviteCodeIds: number[]
   userId: number
 }
 
diff --git a/server/MiAssessment/src/MiAssessment.Admin/admin-web/src/views/business/distribution/invite-code/index.vue b/server/MiAssessment/src/MiAssessment.Admin/admin-web/src/views/business/distribution/invite-code/index.vue
index 3b488ea..b07bb44 100644
--- a/server/MiAssessment/src/MiAssessment.Admin/admin-web/src/views/business/distribution/invite-code/index.vue
+++ b/server/MiAssessment/src/MiAssessment.Admin/admin-web/src/views/business/distribution/invite-code/index.vue
@@ -110,13 +110,34 @@
     </el-dialog>
 
     <!-- 分配对话框 -->
-    <el-dialog v-model="assignDialogVisible" title="分配邀请码" width="400px">
+    <el-dialog v-model="assignDialogVisible" title="分配邀请码" width="500px">
       <el-form :model="assignForm" :rules="assignRules" ref="assignFormRef" label-width="100px">
         <el-form-item label="邀请码数量">
-          <span>{{ assignForm.codeIds.length }} 个</span>
+          <span>{{ assignForm.inviteCodeIds.length }} 个</span>
         </el-form-item>
         <el-form-item label="分配用户" prop="userId">
-          <el-input v-model.number="assignForm.userId" placeholder="请输入用户ID" />
+          <el-select
+            v-model="assignForm.userId"
+            filterable
+            remote
+            reserve-keyword
+            placeholder="输入昵称/手机号/UID搜索用户"
+            :remote-method="searchUsers"
+            :loading="userSearchLoading"
+            style="width: 100%"
+          >
+            <el-option
+              v-for="user in userOptions"
+              :key="user.id"
+              :label="`${user.nickname} (${user.uid})`"
+              :value="user.id"
+            >
+              <div style="display: flex; justify-content: space-between; align-items: center;">
+                <span>{{ user.nickname }} <span style="color: #909399; font-size: 12px;">{{ user.uid }}</span></span>
+                <span style="color: #909399; font-size: 12px;">{{ user.phone || '未绑定手机' }}</span>
+              </div>
+            </el-option>
+          </el-select>
         </el-form-item>
       </el-form>
       <template #footer>
@@ -162,6 +183,7 @@ import {
   type InviteCodeQuery,
   type GenerateResult
 } from '@/api/business/distribution'
+import { getUserList, type UserItem } from '@/api/business/user'
 
 // 列表数据
 const loading = ref(false)
@@ -194,9 +216,36 @@ const resultDialogVisible = ref(false)
 const assignDialogVisible = ref(false)
 const assignLoading = ref(false)
 const assignFormRef = ref<FormInstance>()
-const assignForm = reactive({ codeIds: [] as number[], userId: undefined as number | undefined })
+const assignForm = reactive({ inviteCodeIds: [] as number[], userId: undefined as number | undefined })
 const assignRules: FormRules = {
-  userId: [{ required: true, message: '请输入用户ID', trigger: 'blur' }]
+  userId: [{ required: true, message: '请选择用户', trigger: 'change' }]
+}
+
+// 用户搜索
+const userSearchLoading = ref(false)
+const userOptions = ref<UserItem[]>([])
+const searchUsers = async (query: string) => {
+  if (!query || query.length < 1) {
+    userOptions.value = []
+    return
+  }
+  userSearchLoading.value = true
+  try {
+    // 先按昵称搜索
+    const res = await getUserList({ pageIndex: 1, pageSize: 20, nickname: query })
+    if (res.code === 0) {
+      userOptions.value = res.data.list
+    }
+    // 如果没结果，尝试按UID搜索
+    if (userOptions.value.length === 0) {
+      const uidRes = await getUserList({ pageIndex: 1, pageSize: 20, uid: query })
+      if (uidRes.code === 0) {
+        userOptions.value = uidRes.data.list
+      }
+    }
+  } finally {
+    userSearchLoading.value = false
+  }
 }
 
 // 状态类型映射
@@ -254,13 +303,15 @@ const handleSubmitGenerate = async () => {
 
 // 分配
 const handleAssign = (row: InviteCodeItem) => {
-  assignForm.codeIds = [row.id]
+  assignForm.inviteCodeIds = [row.id]
   assignForm.userId = undefined
+  userOptions.value = []
   assignDialogVisible.value = true
 }
 const handleBatchAssign = () => {
-  assignForm.codeIds = selectedRows.value.map(r => r.id)
+  assignForm.inviteCodeIds = selectedRows.value.map(r => r.id)
   assignForm.userId = undefined
+  userOptions.value = []
   assignDialogVisible.value = true
 }
 const handleSubmitAssign = async () => {
@@ -268,7 +319,7 @@ const handleSubmitAssign = async () => {
   await assignFormRef.value.validate()
   assignLoading.value = true
   try {
-    const res = await assignInviteCodes({ codeIds: assignForm.codeIds, userId: assignForm.userId! })
+    const res = await assignInviteCodes({ inviteCodeIds: assignForm.inviteCodeIds, userId: assignForm.userId! })
     if (res.code === 0) {
       ElMessage.success('分配成功')
       assignDialogVisible.value = false
diff --git a/uniapp/pages/assessment/info/index.vue b/uniapp/pages/assessment/info/index.vue
index 6eb51af..739748c 100644
--- a/uniapp/pages/assessment/info/index.vue
+++ b/uniapp/pages/assessment/info/index.vue
@@ -287,14 +287,24 @@ async function submitInviteCode() {
     const res = await verifyInviteCode(inviteCode.value.trim())
     
     if (res && res.code === 0) {
-      // 验证成功，关闭弹窗并跳转到答题页
-      closeInvitePopup()
-      uni.redirectTo({
-        url: `/pages/assessment/questions/index?typeId=${typeId.value}&inviteCode=${inviteCode.value}`
-      })
+      // 检查邀请码是否有效
+      if (res.data && res.data.isValid) {
+        // 验证成功，关闭弹窗并跳转到答题页
+        closeInvitePopup()
+        uni.redirectTo({
+          url: `/pages/assessment/questions/index?typeId=${typeId.value}&inviteCode=${inviteCode.value}`
+        })
+      } else {
+        // 邀请码无效
+        const errorMsg = res.data?.errorMessage || '邀请码有误，请重新输入'
+        uni.showToast({
+          title: errorMsg,
+          icon: 'none'
+        })
+      }
     } else {
-      // 验证失败
-      const errorMsg = res?.message || '邀请码有误，请重新输入'
+      // 接口调用失败
+      const errorMsg = res?.message || '验证失败，请重试'
       uni.showToast({
         title: errorMsg,
         icon: 'none'