diff --git a/backend/src/main/java/com/designhub/service/AnalyticsService.java b/backend/src/main/java/com/designhub/service/AnalyticsService.java
index 9a48e0f..f18cac8 100644
--- a/backend/src/main/java/com/designhub/service/AnalyticsService.java
+++ b/backend/src/main/java/com/designhub/service/AnalyticsService.java
@@ -32,6 +32,7 @@ import java.util.stream.Collectors;
 public class AnalyticsService {
 
     private final TaskMapper taskMapper;
+    private final TaskItemMapper taskItemMapper;
     private final UserMapper userMapper;
     private final DepartmentMapper departmentMapper;
     private final TeamScorePoolMapper teamScorePoolMapper;
@@ -1489,6 +1490,140 @@ public class AnalyticsService {
             }
         }
         
+        // 查询已完成的子任务（按完成时间查询）
+        List<TaskItem> completedTaskItems = taskItemMapper.selectList(
+            new LambdaQueryWrapper<TaskItem>()
+                .eq(TaskItem::getReceiverId, userId)
+                .eq(TaskItem::getStatus, "completed")
+                .isNotNull(TaskItem::getCompleteTime)
+                .ge(TaskItem::getCompleteTime, startTime)
+                .le(TaskItem::getCompleteTime, endTime)
+        );
+        
+        // 查询进行中的子任务
+        List<TaskItem> inProgressTaskItems = taskItemMapper.selectList(
+            new LambdaQueryWrapper<TaskItem>()
+                .eq(TaskItem::getReceiverId, userId)
+                .eq(TaskItem::getStatus, "in_progress")
+                .isNotNull(TaskItem::getEstimatedHours)
+        );
+        
+        log.info("获取设计师扣分明细 - 用户: {}, 月份: {}, 已完成子任务数: {}, 进行中子任务数: {}", 
+            designer.getRealName() != null ? designer.getRealName() : designer.getUsername(), 
+            currentMonth, completedTaskItems.size(), inProgressTaskItems.size());
+        
+        // 处理已完成的子任务的延误扣分（使用子任务自己的estimatedHours计算deadline）
+        for (TaskItem item : completedTaskItems) {
+            if (item.getEstimatedHours() != null && item.getEstimatedHours().compareTo(BigDecimal.ZERO) > 0
+                && item.getCreateTime() != null && item.getCompleteTime() != null) {
+                
+                // 计算子任务的预期deadline：createTime + estimatedHours
+                long estimatedMinutes = item.getEstimatedHours().multiply(BigDecimal.valueOf(60)).longValue();
+                LocalDateTime expectedDeadline = item.getCreateTime().plusMinutes(estimatedMinutes);
+                
+                // 如果完成时间超过预期deadline，计算延误扣分
+                if (item.getCompleteTime().isAfter(expectedDeadline)) {
+                    BigDecimal itemScore = item.getTotalScore() != null ? BigDecimal.valueOf(item.getTotalScore()) : BigDecimal.ZERO;
+                    
+                    if (itemScore.compareTo(BigDecimal.ZERO) > 0) {
+                        // 计算延误小时数
+                        long overdueHours = Duration.between(expectedDeadline, item.getCompleteTime()).toHours();
+                        
+                        if (overdueHours > 0) {
+                            // 计算扣分
+                            BigDecimal itemDeduction = itemScore
+                                .multiply(BigDecimal.valueOf(overdueHours))
+                                .multiply(deductionRate)
+                                .divide(BigDecimal.valueOf(100), 2, RoundingMode.HALF_UP);
+                            
+                            // 扣分不能超过任务积分
+                            if (itemDeduction.compareTo(itemScore) > 0) {
+                                itemDeduction = itemScore;
+                            }
+                            
+                            totalDelayDeduction = totalDelayDeduction.add(itemDeduction);
+                            
+                            // 获取主任务信息用于显示
+                            Task mainTask = taskMapper.selectById(item.getTaskId());
+                            String taskNo = item.getItemNo() != null ? item.getItemNo() : "";
+                            String taskTitle = mainTask != null ? mainTask.getTitle() : "子任务";
+                            
+                            log.info("发现已完成延误子任务: itemNo={}, 任务积分={}, 延误小时={}, 扣分={}", 
+                                taskNo, itemScore, overdueHours, itemDeduction);
+                            
+                            delayDeductions.add(DeductionDetailVO.DelayDeductionItem.builder()
+                                .taskId(item.getTaskId())  // 使用主任务ID
+                                .taskNo(taskNo)
+                                .taskTitle(taskTitle + " (" + taskNo + ")")
+                                .taskScore(itemScore)
+                                .deadline(expectedDeadline)
+                                .actualEndTime(item.getCompleteTime())
+                                .overdueHours(overdueHours)
+                                .deductionScore(itemDeduction)
+                                .deductionReason("子任务延误 " + overdueHours + " 小时")
+                                .build());
+                        }
+                    }
+                }
+            }
+        }
+        
+        // 处理进行中的子任务的延误扣分（使用子任务自己的estimatedHours计算deadline）
+        for (TaskItem item : inProgressTaskItems) {
+            if (item.getEstimatedHours() != null && item.getEstimatedHours().compareTo(BigDecimal.ZERO) > 0
+                && item.getCreateTime() != null) {
+                
+                // 计算子任务的预期deadline：createTime + estimatedHours
+                long estimatedMinutes = item.getEstimatedHours().multiply(BigDecimal.valueOf(60)).longValue();
+                LocalDateTime expectedDeadline = item.getCreateTime().plusMinutes(estimatedMinutes);
+                
+                // 如果当前时间超过预期deadline，计算延误扣分
+                if (now.isAfter(expectedDeadline)) {
+                    BigDecimal itemScore = item.getTotalScore() != null ? BigDecimal.valueOf(item.getTotalScore()) : BigDecimal.ZERO;
+                    
+                    if (itemScore.compareTo(BigDecimal.ZERO) > 0) {
+                        // 计算延误小时数（当前时间 - 预期deadline）
+                        long overdueHours = Duration.between(expectedDeadline, now).toHours();
+                        
+                        if (overdueHours > 0) {
+                            // 计算扣分
+                            BigDecimal itemDeduction = itemScore
+                                .multiply(BigDecimal.valueOf(overdueHours))
+                                .multiply(deductionRate)
+                                .divide(BigDecimal.valueOf(100), 2, RoundingMode.HALF_UP);
+                            
+                            // 扣分不能超过任务积分
+                            if (itemDeduction.compareTo(itemScore) > 0) {
+                                itemDeduction = itemScore;
+                            }
+                            
+                            totalDelayDeduction = totalDelayDeduction.add(itemDeduction);
+                            
+                            // 获取主任务信息用于显示
+                            Task mainTask = taskMapper.selectById(item.getTaskId());
+                            String taskNo = item.getItemNo() != null ? item.getItemNo() : "";
+                            String taskTitle = mainTask != null ? mainTask.getTitle() : "子任务";
+                            
+                            log.info("发现进行中延误子任务: itemNo={}, 任务积分={}, 延误小时={}, 扣分={}", 
+                                taskNo, itemScore, overdueHours, itemDeduction);
+                            
+                            delayDeductions.add(DeductionDetailVO.DelayDeductionItem.builder()
+                                .taskId(item.getTaskId())  // 使用主任务ID
+                                .taskNo(taskNo)
+                                .taskTitle(taskTitle + " (" + taskNo + ")")
+                                .taskScore(itemScore)
+                                .deadline(expectedDeadline)
+                                .actualEndTime(null)  // 进行中子任务没有完成时间
+                                .overdueHours(overdueHours)
+                                .deductionScore(itemDeduction)
+                                .deductionReason("子任务进行中，已延误 " + overdueHours + " 小时")
+                                .build());
+                        }
+                    }
+                }
+            }
+        }
+        
         log.info("延误扣分总数: {}, 延误扣分记录数: {}", totalDelayDeduction, delayDeductions.size());
         
         // 获取进度未更新扣分明细