diff --git a/odcs2.com/src/views/Home/common/login.vue b/odcs2.com/src/views/Home/common/login.vue
index 7fc1563..8c94f28 100644
--- a/odcs2.com/src/views/Home/common/login.vue
+++ b/odcs2.com/src/views/Home/common/login.vue
@@ -81,7 +81,7 @@
     <div class="main_center" v-if="status == 'zc'">
       <div class="main_top">注册</div>
       <div class="main_input">
-        <input type="text" v-model="registerform.phoneNumber" placeholder="请输入账号" autocomplete="off" />
+        <input type="text" v-model="registerform.phoneNumber" placeholder="请输入手机号" autocomplete="off" />
       </div>
       <div class="main_input">
         <input type="text" v-model="registerform.nickName" placeholder="请输入昵称" autocomplete="off" />
@@ -276,7 +276,7 @@ export default {
       }
       if (this.registerform.phoneNumber == "") {
         this.$message({
-          message: "请输入账号",
+          message: "请输入手机号",
           type: "warning",
           customClass: "log_warning",
         });
diff --git a/skins-service/service-admin/src/main/java/com/ruoyi/admin/controller/TtUserController.java b/skins-service/service-admin/src/main/java/com/ruoyi/admin/controller/TtUserController.java
index bc00f80..8ef528d 100644
--- a/skins-service/service-admin/src/main/java/com/ruoyi/admin/controller/TtUserController.java
+++ b/skins-service/service-admin/src/main/java/com/ruoyi/admin/controller/TtUserController.java
@@ -115,7 +115,11 @@ public class TtUserController extends BaseController {
 
     @DeleteMapping("/{userIds}")
     public AjaxResult remove(@PathVariable Long[] userIds) {
-        return toAjax(userService.removeByIds(Arrays.asList(userIds)));
+        // 直接从数据库物理删除，避免逻辑删除后手机号被唯一索引占用无法重新注册
+        for (Long userId : userIds) {
+            ttUserMapper.removeByUserId(userId.intValue());
+        }
+        return toAjax(userIds.length);
     }
 
     @GetMapping("/online/list")
diff --git a/skins-service/service-user/src/main/java/com/ruoyi/user/service/impl/ApiRegisterServiceImpl.java b/skins-service/service-user/src/main/java/com/ruoyi/user/service/impl/ApiRegisterServiceImpl.java
index 8ee3c94..4de09ca 100644
--- a/skins-service/service-user/src/main/java/com/ruoyi/user/service/impl/ApiRegisterServiceImpl.java
+++ b/skins-service/service-user/src/main/java/com/ruoyi/user/service/impl/ApiRegisterServiceImpl.java
@@ -79,12 +79,17 @@ public class ApiRegisterServiceImpl implements ApiRegisterService {
         if (!userService.checkPhoneUnique(ttUser)) return "注册失败，" + "手机号'" + phoneNumber + "'已被注册！";
         if (!userService.checkUserNameUnique(ttUser))
             return "注册失败，" + "用户名'" + ttUser.getUserName() + "'已存在！";
+        // 唯一索引对已逻辑删除的用户也生效，这里不区分 del_flag 再检查一次，避免插入时报唯一索引冲突
+        Long existCount = new LambdaQueryChainWrapper<>(userService.getBaseMapper())
+            .eq(TtUser::getUserName, phoneNumber)
+            .count();
+        if (existCount != null && existCount > 0) {
+            return "注册失败，手机号'" + phoneNumber + "'已被注册！";
+        }
         ttUser.setNickName(nickName);
         ttUser.setUserType("02");
-        List<TtUserAvatar> userAvatarList = new LambdaQueryChainWrapper<>(userAvatarService.getBaseMapper()).eq(TtUserAvatar::getIsDefault, "1").list();
-        if (!userAvatarList.isEmpty()) {
-            ttUser.setAvatar(RandomUtil.choice(userAvatarList).getAvatar());
-        } else ttUser.setAvatar("");
+        // 注册用户统一使用前端默认头像，不再随机分配头像
+        ttUser.setAvatar("");
         ttUser.setPassword(SecurityUtils.encryptPassword(password));
         String registerRedPacketStr = configService.selectConfigByKey("registerRedPacket");
         BigDecimal registerRedPacket = new BigDecimal(registerRedPacketStr);
@@ -109,7 +114,13 @@ public class ApiRegisterServiceImpl implements ApiRegisterService {
         // String validateCaptcha = apiSmsService.validateCaptcha(code.trim(), "ApiRegister_" + phoneNumber);
         // if (!"success".equals(validateCaptcha)) return validateCaptcha;
         ttUser.setUserId(userIdGenerator.generateUserId());
-        boolean regFlag = userService.save(ttUser);
+        boolean regFlag;
+        try {
+            regFlag = userService.save(ttUser);
+        } catch (org.springframework.dao.DuplicateKeyException e) {
+            // 并发注册或历史删除用户占用唯一索引时的兜底提示
+            return "注册失败，手机号'" + phoneNumber + "'已被注册！";
+        }
         if (!regFlag) return "注册失败,请联系系统管理人员";
         else {
             if (BigDecimal.ZERO.compareTo(registerRedPacket) < 0) {