diff --git a/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/dal/mysql/dept/PostMapper.java b/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/dal/mysql/dept/PostMapper.java
index 4556ce9a..d1bd29d5 100644
--- a/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/dal/mysql/dept/PostMapper.java
+++ b/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/dal/mysql/dept/PostMapper.java
@@ -9,6 +9,7 @@ import org.apache.ibatis.annotations.Mapper;
 
 import java.util.Collection;
 import java.util.List;
+import java.util.Collections;
 
 @Mapper
 public interface PostMapper extends BaseMapperX<PostDO> {
@@ -35,4 +36,12 @@ public interface PostMapper extends BaseMapperX<PostDO> {
         return selectOne(PostDO::getCode, code);
     }
 
+    default List<PostDO> selectByCodes(Collection<String> codes) {
+        if (codes == null || codes.isEmpty()) {
+            return Collections.emptyList();
+        }
+        return selectList(new LambdaQueryWrapperX<PostDO>()
+                .in(PostDO::getCode, codes));
+    }
+
 }
diff --git a/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/integration/iwork/impl/IWorkSyncProcessorImpl.java b/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/integration/iwork/impl/IWorkSyncProcessorImpl.java
index 3c92a184..4db5f260 100644
--- a/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/integration/iwork/impl/IWorkSyncProcessorImpl.java
+++ b/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/integration/iwork/impl/IWorkSyncProcessorImpl.java
@@ -322,7 +322,41 @@ public class IWorkSyncProcessorImpl implements IWorkSyncProcessor {
         if (records.isEmpty()) {
             return result;
         }
+        long batchStart = System.currentTimeMillis();
         result.increasePulled(records.size());
+        // 预取已有用户，避免逐条查询
+        long preloadUsersStart = System.currentTimeMillis();
+        Map<Long, AdminUserDO> existingUsers = new HashMap<>();
+        List<Long> userIds = records.stream()
+                .map(IWorkHrUserPageRespVO.User::getId)
+                .filter(Objects::nonNull)
+                .map(Integer::longValue)
+                .distinct()
+                .toList();
+        if (!userIds.isEmpty()) {
+            List<AdminUserDO> users = adminUserMapper.selectBatchIds(userIds);
+            if (CollUtil.isNotEmpty(users)) {
+                users.forEach(user -> existingUsers.put(user.getId(), user));
+            }
+        }
+        long preloadUsersMs = System.currentTimeMillis() - preloadUsersStart;
+
+        // 预取岗位，避免逐条按编码查询
+        long preloadPostsStart = System.currentTimeMillis();
+        List<String> postCodes = records.stream()
+                .map(IWorkHrUserPageRespVO.User::getJobtitleid)
+                .filter(Objects::nonNull)
+                .map(this::buildJobCode)
+                .distinct()
+                .toList();
+        if (!postCodes.isEmpty()) {
+            List<PostDO> posts = postMapper.selectByCodes(postCodes);
+            if (CollUtil.isNotEmpty(posts)) {
+                posts.forEach(post -> postCache.put(buildPostCacheKey(post.getCode()), post));
+            }
+        }
+        long preloadPostsMs = System.currentTimeMillis() - preloadPostsStart;
+
         for (IWorkHrUserPageRespVO.User user : records) {
             if (user == null) {
                 continue;
@@ -344,7 +378,7 @@ public class IWorkSyncProcessorImpl implements IWorkSyncProcessor {
                 CommonStatusEnum status = inactive ? CommonStatusEnum.DISABLE : CommonStatusEnum.ENABLE;
                 // 直接沿用 iWork 原始密码，避免重复格式化造成校验偏差
                 String externalPassword = trimToNull(user.getPassword());
-                AdminUserDO existing = adminUserMapper.selectById(user.getId());
+                AdminUserDO existing = user.getId() == null ? null : existingUsers.get(user.getId().longValue());
                 UserSyncOutcome outcome;
                 if (existing == null) {
                     if (!options.isCreateIfMissing()) {
@@ -377,6 +411,9 @@ public class IWorkSyncProcessorImpl implements IWorkSyncProcessor {
                 result.withMessage("同步人员失败: " + ex.getMessage());
             }
         }
+        long totalMs = System.currentTimeMillis() - batchStart;
+        log.info("[iWork] 人员批次同步完成 size={} preloadUsersMs={} preloadPostsMs={} totalMs={}",
+                records.size(), preloadUsersMs, preloadPostsMs, totalMs);
         return result;
     }
     //TODO
@@ -495,11 +532,43 @@ public class IWorkSyncProcessorImpl implements IWorkSyncProcessor {
         UserSaveReqVO req = buildUserSaveReq(source, username, deptId, postId, status);
         req.setId(existing.getId());
         boolean disabledChanged = CommonStatusEnum.isDisable(status.getStatus()) && CommonStatusEnum.isEnable(existing.getStatus());
-        adminUserService.updateUser(req);
-        syncPassword(existing, externalPassword);
+        boolean infoChanged = isUserInfoChanged(existing, req);
+        boolean passwordChanged = isPasswordChanged(existing, externalPassword);
+
+        if (!infoChanged && !passwordChanged) {
+            return new UserSyncOutcome(SyncAction.SKIPPED, false, existing.getId());
+        }
+
+        if (infoChanged) {
+            adminUserService.updateUser(req);
+        }
+        if (passwordChanged) {
+            syncPassword(existing, externalPassword);
+        }
         return new UserSyncOutcome(SyncAction.UPDATED, disabledChanged, existing.getId());
     }
 
+    private boolean isUserInfoChanged(AdminUserDO existing, UserSaveReqVO req) {
+        if (existing == null || req == null) {
+            return false;
+        }
+        return !Objects.equals(existing.getUsername(), req.getUsername())
+                || !Objects.equals(existing.getWorkcode(), req.getWorkcode())
+                || !Objects.equals(existing.getNickname(), req.getNickname())
+                || !Objects.equals(existing.getRemark(), req.getRemark())
+                || !Objects.equals(existing.getEmail(), req.getEmail())
+                || !Objects.equals(existing.getMobile(), req.getMobile())
+                || !Objects.equals(existing.getSex(), req.getSex())
+                || !Objects.equals(existing.getStatus(), req.getStatus());
+    }
+
+    private boolean isPasswordChanged(AdminUserDO existing, String externalPassword) {
+        if (existing == null || StrUtil.isBlank(externalPassword)) {
+            return false;
+        }
+        return !StrUtil.equals(externalPassword, existing.getPassword());
+    }
+
     private DeptSaveReqVO buildSubcompanySaveReq(IWorkHrSubcompanyPageRespVO.Subcompany data,
                                                  Long deptId,
                                                  Long parentId,
diff --git a/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/integration/iwork/impl/IWorkSyncServiceImpl.java b/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/integration/iwork/impl/IWorkSyncServiceImpl.java
index 95ac0cdc..bc0e763f 100644
--- a/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/integration/iwork/impl/IWorkSyncServiceImpl.java
+++ b/zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/integration/iwork/impl/IWorkSyncServiceImpl.java
@@ -217,11 +217,14 @@ public class IWorkSyncServiceImpl implements IWorkSyncService {
         int pagesLimit = reqVO.getMaxPages() == null ? Integer.MAX_VALUE : reqVO.getMaxPages();
         int processedPages = 0;
         for (int page = startPage; processedPages < pagesLimit; page++) {
+            long pageStart = System.currentTimeMillis();
             BatchExecution execution = executor.execute(page, pageSize);
+            long pageMs = System.currentTimeMillis() - pageStart;
             if (execution == null || execution.totalPulled == 0) {
                 break;
             }
             processedPages++;
+            log.info("[iWork] 全量同步 {} 页={} pulled={} costMs={}", type, page, execution.totalPulled, pageMs);
             IWorkSyncBatchStatVO batchStat = new IWorkSyncBatchStatVO();
             batchStat.setEntityType(type);
             batchStat.setPageNumber(page);
@@ -403,11 +406,14 @@ public class IWorkSyncServiceImpl implements IWorkSyncService {
         int pagesLimit = reqVO.getMaxPages() == null ? Integer.MAX_VALUE : reqVO.getMaxPages();
         int processedPages = 0;
         for (int page = startPage; processedPages < pagesLimit; page++) {
+            long pageStart = System.currentTimeMillis();
             BatchExecution execution = executor.execute(page, pageSize);
+            long pageMs = System.currentTimeMillis() - pageStart;
             if (execution == null || execution.totalPulled == 0) {
                 break;
             }
             processedPages++;
+            log.info("[iWork] 手动同步 {} 页={} pulled={} costMs={}", type, page, execution.totalPulled, pageMs);
             IWorkSyncBatchStatVO batchStat = new IWorkSyncBatchStatVO();
             batchStat.setEntityType(type);
             batchStat.setPageNumber(page);