diff --git a/src/main/java/com/cdzy/activity/controller/ActivityController.java b/src/main/java/com/cdzy/activity/controller/ActivityController.java
index 2d51c8a..3745a9d 100644
--- a/src/main/java/com/cdzy/activity/controller/ActivityController.java
+++ b/src/main/java/com/cdzy/activity/controller/ActivityController.java
@@ -110,9 +110,10 @@ public class ActivityController {
     public JsonResult<?> getInfo(@PathVariable Long id) {
         Activity activity = activityService.getById(id);
         QueryWrapper queryWrapper = QueryWrapper.create()
-                .select(ACTIVITY_USER.USER_ID)
-                        .where(ACTIVITY_USER.ACTIVITY_ID.eq(activity.getActivityId()));
-        List<Long> list = activityUserMapper.selectListByQueryAs(queryWrapper,Long.class);
+                .select(USER.ALL_COLUMNS)
+                .where(ACTIVITY_USER.ACTIVITY_ID.eq(activity.getActivityId()))
+                .leftJoin(USER).on(USER.USER_ID.eq(ACTIVITY_USER.USER_ID));
+        List<User> list = activityUserMapper.selectListByQueryAs(queryWrapper,User.class);
         ActivityDto activityDto = new ActivityDto(activity, list);
         return JsonResult.success(activityDto);
     }
diff --git a/src/main/java/com/cdzy/activity/controller/UserController.java b/src/main/java/com/cdzy/activity/controller/UserController.java
index 2297068..957d84d 100644
--- a/src/main/java/com/cdzy/activity/controller/UserController.java
+++ b/src/main/java/com/cdzy/activity/controller/UserController.java
@@ -132,7 +132,7 @@ public class UserController {
      */
     @PostMapping("activity/registration")
     public JsonResult<?> registration(@RequestBody RegistrationVo registrationVo) {
-
+        userService.registration(registrationVo);
         return JsonResult.success();
     }
 }
diff --git a/src/main/java/com/cdzy/activity/model/dto/ActivityDto.java b/src/main/java/com/cdzy/activity/model/dto/ActivityDto.java
index bf8f864..b95414d 100644
--- a/src/main/java/com/cdzy/activity/model/dto/ActivityDto.java
+++ b/src/main/java/com/cdzy/activity/model/dto/ActivityDto.java
@@ -1,6 +1,7 @@
 package com.cdzy.activity.model.dto;
 
 import com.cdzy.activity.model.Activity;
+import com.cdzy.activity.model.User;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
@@ -23,5 +24,5 @@ public class ActivityDto implements Serializable {
 
 
     private Activity activity;
-    private List<Long> userIds;
+    private List<User> userIds;
 }
diff --git a/src/main/java/com/cdzy/activity/model/vo/RegistrationVo.java b/src/main/java/com/cdzy/activity/model/vo/RegistrationVo.java
index f9586f7..8277a33 100644
--- a/src/main/java/com/cdzy/activity/model/vo/RegistrationVo.java
+++ b/src/main/java/com/cdzy/activity/model/vo/RegistrationVo.java
@@ -2,11 +2,17 @@ package com.cdzy.activity.model.vo;
 
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
 
 /**
  * @author attiya
  * @since 2025-09-22
  */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
 public class RegistrationVo {
 
     @NotBlank(message = "微信openId不能为空")
diff --git a/src/main/java/com/cdzy/activity/service/UserService.java b/src/main/java/com/cdzy/activity/service/UserService.java
index 38a142c..28f6c22 100644
--- a/src/main/java/com/cdzy/activity/service/UserService.java
+++ b/src/main/java/com/cdzy/activity/service/UserService.java
@@ -1,5 +1,6 @@
 package com.cdzy.activity.service;
 
+import com.cdzy.activity.model.vo.RegistrationVo;
 import com.cdzy.activity.model.vo.UserVo;
 import com.mybatisflex.core.service.IService;
 import com.cdzy.activity.model.User;
@@ -13,4 +14,6 @@ import com.cdzy.activity.model.User;
 public interface UserService extends IService<User> {
 
     void saveUser(UserVo user);
+
+    void registration(RegistrationVo registrationVo);
 }
diff --git a/src/main/java/com/cdzy/activity/service/impl/UserServiceImpl.java b/src/main/java/com/cdzy/activity/service/impl/UserServiceImpl.java
index 4c64b9d..f4e6f7f 100644
--- a/src/main/java/com/cdzy/activity/service/impl/UserServiceImpl.java
+++ b/src/main/java/com/cdzy/activity/service/impl/UserServiceImpl.java
@@ -1,5 +1,12 @@
 package com.cdzy.activity.service.impl;
 
+import com.cdzy.activity.mapper.ActivityMapper;
+import com.cdzy.activity.mapper.ActivityUserMapper;
+import com.cdzy.activity.mapper.UserRegistrationActivityMapper;
+import com.cdzy.activity.model.Activity;
+import com.cdzy.activity.model.ActivityUser;
+import com.cdzy.activity.model.UserRegistrationActivity;
+import com.cdzy.activity.model.vo.RegistrationVo;
 import com.cdzy.activity.model.vo.UserVo;
 import com.mybatisflex.core.query.QueryWrapper;
 import com.mybatisflex.spring.service.impl.ServiceImpl;
@@ -9,6 +16,12 @@ import com.cdzy.activity.service.UserService;
 import jakarta.annotation.Resource;
 import org.springframework.stereotype.Service;
 
+import java.time.LocalDateTime;
+
+import static com.cdzy.activity.model.table.ActivityUserTableDef.ACTIVITY_USER;
+import static com.cdzy.activity.model.table.UserRegistrationActivityTableDef.USER_REGISTRATION_ACTIVITY;
+import static com.cdzy.activity.model.table.UserTableDef.USER;
+
 /**
  * 服务层实现。
  *
@@ -21,6 +34,15 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
     @Resource
     private UserMapper userMapper;
 
+    @Resource
+    private ActivityMapper activityMapper;
+
+    @Resource
+    private ActivityUserMapper activityUserMapper;
+
+    @Resource
+    private UserRegistrationActivityMapper userRegistrationActivityMapper;
+
     @Override
     public void saveUser(UserVo user) {
         QueryWrapper queryWrapper = QueryWrapper
@@ -41,4 +63,49 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
         entity.setIsFilled(2);
         userMapper.update(entity);
     }
+
+    @Override
+    public void registration(RegistrationVo registrationVo) {
+        Long activityId = registrationVo.getActivityId();
+        String wxOpenId = registrationVo.getWxOpenId();
+        Activity activity = activityMapper.selectOneById(activityId);
+        if (activity == null) {
+            throw new RuntimeException("该活动不存在");
+        }
+        if (activity.getRegistrationStartTime().isAfter(LocalDateTime.now())){
+            throw new RuntimeException("该活动尚未开始报名");
+        }
+        if (activity.getRegistrationEndTime().isBefore(LocalDateTime.now())){
+            throw new RuntimeException("该活动已结束报名");
+        }
+        if (activity.getLimitPeople() == 1){
+            QueryWrapper queryWrapper = QueryWrapper.create()
+                            .where(USER_REGISTRATION_ACTIVITY.ACTIVITY_ID.eq(activityId));
+            long count = userRegistrationActivityMapper.selectCountByQuery(queryWrapper);
+            if (count >= activity.getMaxNum()){
+                throw new RuntimeException("该活动报名人数已达上限");
+            }
+        }
+        if (activity.getLimitRegister() == 1){
+            QueryWrapper queryWrapper = QueryWrapper.create()
+                    .where(ACTIVITY_USER.ACTIVITY_ID.eq(activityId))
+                    .where(USER.WX_OPEN_ID.eq(wxOpenId))
+                    .leftJoin(USER).on(USER.USER_ID.eq(ACTIVITY_USER.USER_ID));
+            ActivityUser selected = activityUserMapper.selectOneByQuery(queryWrapper);
+            if (selected == null){
+                throw new RuntimeException("该活动限制报名人群，无法报名");
+            }
+        }
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .where(USER.WX_OPEN_ID.eq(wxOpenId));
+        User user = userMapper.selectOneByQuery(queryWrapper);
+        if (user == null){
+            throw new RuntimeException("用户信息错误");
+        }
+        UserRegistrationActivity registrationActivity = UserRegistrationActivity.builder()
+                .activityId(activityId)
+                .userId(user.getUserId())
+                .build();
+        userRegistrationActivityMapper.insert(registrationActivity);
+    }
 }
diff --git a/target/classes/com/cdzy/activity/controller/ActivityController.class b/target/classes/com/cdzy/activity/controller/ActivityController.class
index 89ead70..bb15b53 100644
Binary files a/target/classes/com/cdzy/activity/controller/ActivityController.class and b/target/classes/com/cdzy/activity/controller/ActivityController.class differ
diff --git a/target/classes/com/cdzy/activity/controller/UserController.class b/target/classes/com/cdzy/activity/controller/UserController.class
index d4f58f0..18f374c 100644
Binary files a/target/classes/com/cdzy/activity/controller/UserController.class and b/target/classes/com/cdzy/activity/controller/UserController.class differ
diff --git a/target/classes/com/cdzy/activity/model/dto/ActivityDto.class b/target/classes/com/cdzy/activity/model/dto/ActivityDto.class
index 6e3032c..93ed681 100644
Binary files a/target/classes/com/cdzy/activity/model/dto/ActivityDto.class and b/target/classes/com/cdzy/activity/model/dto/ActivityDto.class differ
diff --git a/target/classes/com/cdzy/activity/service/impl/UserServiceImpl.class b/target/classes/com/cdzy/activity/service/impl/UserServiceImpl.class
index 1118448..a84859b 100644
Binary files a/target/classes/com/cdzy/activity/service/impl/UserServiceImpl.class and b/target/classes/com/cdzy/activity/service/impl/UserServiceImpl.class differ