diff --git a/core/src/main/java/com/dite/znpt/service/impl/ProjectMemberServiceImpl.java b/core/src/main/java/com/dite/znpt/service/impl/ProjectMemberServiceImpl.java
index cdb1428..1c03097 100644
--- a/core/src/main/java/com/dite/znpt/service/impl/ProjectMemberServiceImpl.java
+++ b/core/src/main/java/com/dite/znpt/service/impl/ProjectMemberServiceImpl.java
@@ -18,6 +18,7 @@ import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
 import java.math.BigDecimal;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import java.util.function.Function;
@@ -50,11 +51,22 @@ public class ProjectMemberServiceImpl extends ServiceImpl<ProjectMemberMapper, P
         // 查询团队成员列表
         List<ProjectMemberResp> list = this.baseMapper.queryTeamMembers(query);
         
+        // 按用户ID去重，保留第一个记录
+        Map<String, ProjectMemberResp> uniqueMembers = list.stream()
+                .collect(Collectors.toMap(
+                        ProjectMemberResp::getUserId,
+                        member -> member,
+                        (existing, replacement) -> existing // 如果有重复，保留第一个
+                ));
+        
+        // 转换为列表
+        List<ProjectMemberResp> uniqueList = new ArrayList<>(uniqueMembers.values());
+        
         // 丰富成员信息
-        enrichMemberInfo(list);
+        enrichMemberInfo(uniqueList);
         
         // 返回分页结果
-        return PageResult.ok(list);
+        return PageResult.ok(uniqueList);
     }
 
     /**
@@ -86,43 +98,81 @@ public class ProjectMemberServiceImpl extends ServiceImpl<ProjectMemberMapper, P
             UserEntity user = userMap.get(member.getUserId());
             if (user != null) {
                 // 映射前端需要的字段
-                member.setName(user.getName());
-                member.setPhone(user.getMobile());
-                member.setEmail(user.getEmail());
+                member.setName(user.getName() != null ? user.getName() : "");
+                member.setPhone(user.getMobile() != null ? user.getMobile() : "");
+                member.setEmail(user.getEmail() != null ? user.getEmail() : "");
                 
                 // 保留原有字段用于内部处理
-                member.setUserAccount(user.getAccount());
-                member.setUserAvatar(user.getAvatar());
+                member.setUserAccount(user.getAccount() != null ? user.getAccount() : "");
+                member.setUserAvatar(user.getAvatar() != null ? user.getAvatar() : "");
+            } else {
+                // 如果用户信息不存在，设置默认值
+                member.setName("");
+                member.setPhone("");
+                member.setEmail("");
+                member.setUserAccount("");
+                member.setUserAvatar("");
             }
             
             // 映射岗位信息 - 使用角色类型描述作为岗位
-            member.setPosition(member.getRoleTypeDesc());
+            member.setPosition(member.getRoleTypeDesc() != null ? member.getRoleTypeDesc() : "");
             
             // 映射技能标签 - 暂时设为空，因为数据库中没有这个字段
             member.setSkills("");
             
+            // 处理其他可能为NULL的字段
+            if (member.getTurbineId() == null) {
+                member.setTurbineId("");
+            }
+            if (member.getTurbineName() == null) {
+                member.setTurbineName("");
+            }
+            if (member.getTaskGroupId() == null) {
+                member.setTaskGroupId("");
+            }
+            if (member.getTaskGroupName() == null) {
+                member.setTaskGroupName("");
+            }
+            if (member.getTaskId() == null) {
+                member.setTaskId("");
+            }
+            if (member.getTaskName() == null) {
+                member.setTaskName("");
+            }
+            if (member.getRemark() == null) {
+                member.setRemark("");
+            }
+            
             // 设置状态描述
-            if ("ACTIVE".equals(member.getStatus())) {
-                member.setStatusDesc("在职");
-            } else if ("INACTIVE".equals(member.getStatus())) {
-                member.setStatusDesc("离职");
-            } else if ("PENDING".equals(member.getStatus())) {
-                member.setStatusDesc("待入职");
+            if (member.getStatus() != null) {
+                if ("ACTIVE".equals(member.getStatus())) {
+                    member.setStatusDesc("在职");
+                } else if ("INACTIVE".equals(member.getStatus())) {
+                    member.setStatusDesc("离职");
+                } else if ("PENDING".equals(member.getStatus())) {
+                    member.setStatusDesc("待入职");
+                } else {
+                    member.setStatusDesc("未知");
+                }
             } else {
                 member.setStatusDesc("未知");
             }
             
             // 设置角色类型描述
-            if ("PROJECT_MANAGER".equals(member.getRoleType())) {
-                member.setRoleTypeDesc("项目经理");
-            } else if ("SAFETY_OFFICER".equals(member.getRoleType())) {
-                member.setRoleTypeDesc("安全员");
-            } else if ("QUALITY_OFFICER".equals(member.getRoleType())) {
-                member.setRoleTypeDesc("质量员");
-            } else if ("CONSTRUCTOR".equals(member.getRoleType())) {
-                member.setRoleTypeDesc("施工员");
-            } else if ("TEAM_LEADER".equals(member.getRoleType())) {
-                member.setRoleTypeDesc("施工组长");
+            if (member.getRoleType() != null) {
+                if ("PROJECT_MANAGER".equals(member.getRoleType())) {
+                    member.setRoleTypeDesc("项目经理");
+                } else if ("SAFETY_OFFICER".equals(member.getRoleType())) {
+                    member.setRoleTypeDesc("安全员");
+                } else if ("QUALITY_OFFICER".equals(member.getRoleType())) {
+                    member.setRoleTypeDesc("质量员");
+                } else if ("CONSTRUCTOR".equals(member.getRoleType())) {
+                    member.setRoleTypeDesc("施工员");
+                } else if ("TEAM_LEADER".equals(member.getRoleType())) {
+                    member.setRoleTypeDesc("施工组长");
+                } else {
+                    member.setRoleTypeDesc("其他");
+                }
             } else {
                 member.setRoleTypeDesc("其他");
             }
@@ -131,41 +181,8 @@ public class ProjectMemberServiceImpl extends ServiceImpl<ProjectMemberMapper, P
 
     @Override
     public ProjectMemberResp createTeamMember(TeamMemberReq req) {
-        // 验证项目是否存在
-        ProjectEntity project = projectService.getById(req.getProjectId());
-        if (project == null) {
-            throw new ServiceException(Message.PROJECT_ID_IS_NOT_EXIST);
-        }
-
-        // 验证用户是否存在
-        UserEntity user = userService.getById(req.getUserId());
-        if (user == null) {
-            throw new ServiceException("用户不存在");
-        }
-
-        // 验证机组是否存在（如果指定了机组）
-        if (StrUtil.isNotBlank(req.getTurbineId())) {
-            TurbineEntity turbine = turbineService.getById(req.getTurbineId());
-            if (turbine == null) {
-                throw new ServiceException("机组不存在");
-            }
-        }
-
-        // 验证任务组是否存在（如果指定了任务组）
-        if (StrUtil.isNotBlank(req.getTaskGroupId())) {
-            ProjectTaskGroupEntity taskGroup = projectTaskGroupService.getById(req.getTaskGroupId());
-            if (taskGroup == null) {
-                throw new ServiceException("任务组不存在");
-            }
-        }
-
-        // 验证任务是否存在（如果指定了任务）
-        if (StrUtil.isNotBlank(req.getTaskId())) {
-            ProjectTaskEntity task = projectTaskService.getById(req.getTaskId());
-            if (task == null) {
-                throw new ServiceException("任务不存在");
-            }
-        }
+        // 验证请求参数
+        validateTeamMemberRequest(req);
 
         // 创建项目成员实体
         ProjectMemberEntity entity = new ProjectMemberEntity();
@@ -186,41 +203,8 @@ public class ProjectMemberServiceImpl extends ServiceImpl<ProjectMemberMapper, P
             throw new ServiceException("项目成员不存在");
         }
 
-        // 验证项目是否存在
-        ProjectEntity project = projectService.getById(req.getProjectId());
-        if (project == null) {
-            throw new ServiceException(Message.PROJECT_ID_IS_NOT_EXIST);
-        }
-
-        // 验证用户是否存在
-        UserEntity user = userService.getById(req.getUserId());
-        if (user == null) {
-            throw new ServiceException("用户不存在");
-        }
-
-        // 验证机组是否存在（如果指定了机组）
-        if (StrUtil.isNotBlank(req.getTurbineId())) {
-            TurbineEntity turbine = turbineService.getById(req.getTurbineId());
-            if (turbine == null) {
-                throw new ServiceException("机组不存在");
-            }
-        }
-
-        // 验证任务组是否存在（如果指定了任务组）
-        if (StrUtil.isNotBlank(req.getTaskGroupId())) {
-            ProjectTaskGroupEntity taskGroup = projectTaskGroupService.getById(req.getTaskGroupId());
-            if (taskGroup == null) {
-                throw new ServiceException("任务组不存在");
-            }
-        }
-
-        // 验证任务是否存在（如果指定了任务）
-        if (StrUtil.isNotBlank(req.getTaskId())) {
-            ProjectTaskEntity task = projectTaskService.getById(req.getTaskId());
-            if (task == null) {
-                throw new ServiceException("任务不存在");
-            }
-        }
+        // 验证请求参数
+        validateTeamMemberRequest(req);
 
         // 更新成员信息
         BeanUtil.copyProperties(req, existingMember);
@@ -246,6 +230,47 @@ public class ProjectMemberServiceImpl extends ServiceImpl<ProjectMemberMapper, P
         return this.removeByIds(CollUtil.toList(memberIds));
     }
 
+    /**
+     * 验证团队成员请求参数
+     */
+    private void validateTeamMemberRequest(TeamMemberReq req) {
+        // 验证项目是否存在
+        ProjectEntity project = projectService.getById(req.getProjectId());
+        if (project == null) {
+            throw new ServiceException(Message.PROJECT_ID_IS_NOT_EXIST);
+        }
+
+        // 验证用户是否存在
+        UserEntity user = userService.getById(req.getUserId());
+        if (user == null) {
+            throw new ServiceException("用户不存在");
+        }
+
+        // 验证机组是否存在（如果指定了机组）
+        if (StrUtil.isNotBlank(req.getTurbineId())) {
+            TurbineEntity turbine = turbineService.getById(req.getTurbineId());
+            if (turbine == null) {
+                throw new ServiceException("机组不存在");
+            }
+        }
+
+        // 验证任务组是否存在（如果指定了任务组）
+        if (StrUtil.isNotBlank(req.getTaskGroupId())) {
+            ProjectTaskGroupEntity taskGroup = projectTaskGroupService.getById(req.getTaskGroupId());
+            if (taskGroup == null) {
+                throw new ServiceException("任务组不存在");
+            }
+        }
+
+        // 验证任务是否存在（如果指定了任务）
+        if (StrUtil.isNotBlank(req.getTaskId())) {
+            ProjectTaskEntity task = projectTaskService.getById(req.getTaskId());
+            if (task == null) {
+                throw new ServiceException("任务不存在");
+            }
+        }
+    }
+
     /**
      * 根据成员ID获取成员信息
      */
@@ -468,19 +493,28 @@ public class ProjectMemberServiceImpl extends ServiceImpl<ProjectMemberMapper, P
             // 设置项目经理
             item.setManager(memberNames.get("PROJECT_MANAGER"));
 
-            // 设置团队规模
-            item.setTeamSize(members.size());
+            // 设置团队规模 - 使用去重后的数量
+            item.setTeamSize((int) members.stream()
+                    .map(ProjectMemberResp::getUserId)
+                    .distinct()
+                    .count());
 
-            // 转换为团队成员列表
+            // 转换为团队成员列表 - 按用户ID去重
             List<ProjectKanbanDataResp.ProjectKanbanItem.TeamMemberResp> teamMembers = members.stream()
-                    .map(member -> {
-                        ProjectKanbanDataResp.ProjectKanbanItem.TeamMemberResp teamMember = new ProjectKanbanDataResp.ProjectKanbanItem.TeamMemberResp();
-                        // 先复制所有同名字段
-                        BeanUtil.copyProperties(member, teamMember);
-                        // 手动处理字段名不一致的字段
-                        teamMember.setUserName(member.getName()); // name -> userName
-                        return teamMember;
-                    })
+                    .collect(Collectors.toMap(
+                            ProjectMemberResp::getUserId, // 按用户ID去重
+                            member -> {
+                                ProjectKanbanDataResp.ProjectKanbanItem.TeamMemberResp teamMember = new ProjectKanbanDataResp.ProjectKanbanItem.TeamMemberResp();
+                                // 先复制所有同名字段
+                                BeanUtil.copyProperties(member, teamMember);
+                                // 手动处理字段名不一致的字段
+                                teamMember.setUserName(member.getName()); // name -> userName
+                                return teamMember;
+                            },
+                            (existing, replacement) -> existing // 如果有重复，保留第一个
+                    ))
+                    .values()
+                    .stream()
                     .collect(Collectors.toList());
             item.setTeamMembers(teamMembers);
 
diff --git a/core/src/main/resources/mapper/ProjectMemberMapper.xml b/core/src/main/resources/mapper/ProjectMemberMapper.xml
index 81892d0..9d2ef2e 100644
--- a/core/src/main/resources/mapper/ProjectMemberMapper.xml
+++ b/core/src/main/resources/mapper/ProjectMemberMapper.xml
@@ -4,7 +4,7 @@
 
     <!-- 获取项目团队成员列表（支持筛选、分页、搜索） -->
     <select id="queryTeamMembers" resultType="com.dite.znpt.domain.vo.ProjectMemberResp">
-        SELECT DISTINCT
+        SELECT 
             pm.member_id,
             pm.project_id,
             p.project_name,