diff --git a/backend/src/main/java/com/designhub/service/TaskItemService.java b/backend/src/main/java/com/designhub/service/TaskItemService.java
index f5868bc..9b539f5 100644
--- a/backend/src/main/java/com/designhub/service/TaskItemService.java
+++ b/backend/src/main/java/com/designhub/service/TaskItemService.java
@@ -824,12 +824,20 @@ public class TaskItemService {
                 throw new BusinessException(ResultCode.PARAM_ERROR, "指定的接收人不存在");
             }
 
+            LocalDateTime now = LocalDateTime.now();
+            
             // 批量分配给指定设计师
             for (TaskItem item : groupItems) {
                 item.setStatus("in_progress");
                 item.setReceiverId(assignedReceiverId);
                 item.setReceiverDeptId(receiver.getDeptId()); // 设置接单部门ID
-                item.setUpdateTime(LocalDateTime.now());
+                item.setUpdateTime(now);
+                // 计算并设置deadline（使用工作时间计算）
+                if (item.getEstimatedHours() != null && item.getEstimatedHours().compareTo(java.math.BigDecimal.ZERO) > 0) {
+                    LocalDateTime deadline = workHoursCalculator.calculateDeadline(now, item.getEstimatedHours());
+                    item.setDeadline(deadline);
+                    log.info("子任务组审核通过，子任务 {} 设置deadline: {}", item.getId(), deadline);
+                }
                 taskItemMapper.updateById(item);
             }
 
diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index 222529d..c0adc03 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -3231,6 +3231,8 @@ public class TaskService {
             return;
         }
         
+        LocalDateTime now = LocalDateTime.now();
+        
         if ("parallel".equals(pipelineMode)) {
             // 并行模式：所有子任务都进入in_progress状态，并设置接收人
             for (TaskItem item : taskItems) {
@@ -3245,6 +3247,12 @@ public class TaskService {
                     log.info("并行流水线子任务 {} 已设置/更新接收人: receiverId={}, deptId={}", 
                             item.getId(), receiverId, receiverDeptId);
                 }
+                // 计算并设置deadline（使用工作时间计算）
+                if (item.getEstimatedHours() != null && item.getEstimatedHours().compareTo(BigDecimal.ZERO) > 0) {
+                    LocalDateTime deadline = workHoursCalculator.calculateDeadline(now, item.getEstimatedHours());
+                    item.setDeadline(deadline);
+                    log.info("并行流水线子任务 {} 设置deadline: {}", item.getId(), deadline);
+                }
                 taskItemMapper.updateById(item);
             }
             log.info("并行流水线任务的所有子任务已更新为in_progress：count={}", taskItems.size());
@@ -3278,6 +3286,12 @@ public class TaskService {
                         log.info("顺序流水线第一部门子任务 {} 保留预先指定的接收人: receiverId={}", 
                                 item.getId(), item.getReceiverId());
                     }
+                    // 计算并设置deadline（使用工作时间计算）
+                    if (item.getEstimatedHours() != null && item.getEstimatedHours().compareTo(BigDecimal.ZERO) > 0) {
+                        LocalDateTime deadline = workHoursCalculator.calculateDeadline(now, item.getEstimatedHours());
+                        item.setDeadline(deadline);
+                        log.info("顺序流水线第一部门子任务 {} 设置deadline: {}", item.getId(), deadline);
+                    }
                     taskItemMapper.updateById(item);
                     log.info("顺序流水线任务第一部门子任务已更新为in_progress：itemId={}, itemNo={}", 
                             item.getId(), item.getItemNo());