diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index b8c12b2..de89556 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -5019,6 +5019,88 @@ public class TaskService {
                 node3.setStatus("waiting");
             }
             timeline.add(node3);
+            
+            // 4. 如果是流水线任务，添加每个节点的详细进度
+            boolean isPipeline = task.getIsPipeline() != null && task.getIsPipeline() == 1;
+            if (isPipeline && ("in_progress".equals(status) || "completed".equals(status))) {
+                // 查询所有子任务，按 group_no 分组
+                java.util.List<TaskItem> taskItems = taskItemMapper.selectList(
+                    new LambdaQueryWrapper<TaskItem>()
+                        .eq(TaskItem::getTaskId, task.getId())
+                        .orderByAsc(TaskItem::getGroupNo)
+                        .orderByAsc(TaskItem::getSortOrder)
+                );
+                
+                // 按 group_no 分组统计
+                java.util.Map<Integer, java.util.List<TaskItem>> groupedItems = taskItems.stream()
+                    .collect(java.util.stream.Collectors.groupingBy(
+                        item -> item.getGroupNo() != null ? item.getGroupNo() : 1
+                    ));
+                
+                // 为每个节点创建时间线项
+                java.util.List<Integer> sortedGroupNos = groupedItems.keySet().stream()
+                    .sorted()
+                    .collect(java.util.stream.Collectors.toList());
+                
+                for (Integer groupNo : sortedGroupNos) {
+                    java.util.List<TaskItem> groupItems = groupedItems.get(groupNo);
+                    if (groupItems == null || groupItems.isEmpty()) continue;
+                    
+                    // 统计该节点的完成情况
+                    int totalItems = groupItems.size();
+                    int completedItems = 0;
+                    int inProgressItems = 0;
+                    int pendingApprovalItems = 0;
+                    TaskItem firstItem = groupItems.get(0);
+                    String receiverName = null;
+                    java.time.LocalDateTime completeTime = null;
+                    
+                    for (TaskItem item : groupItems) {
+                        if ("completed".equals(item.getStatus())) {
+                            completedItems++;
+                            if (completeTime == null || (item.getCompleteTime() != null && item.getCompleteTime().isAfter(completeTime))) {
+                                completeTime = item.getCompleteTime();
+                            }
+                        } else if ("in_progress".equals(item.getStatus())) {
+                            inProgressItems++;
+                        } else if ("pending_approval".equals(item.getStatus())) {
+                            pendingApprovalItems++;
+                        }
+                        if (receiverName == null && item.getReceiverName() != null) {
+                            receiverName = item.getReceiverName();
+                        }
+                    }
+                    
+                    // 创建节点时间线
+                    com.designhub.vo.TaskFlowStatusVO.FlowTimelineNode pipelineNode = new com.designhub.vo.TaskFlowStatusVO.FlowTimelineNode();
+                    pipelineNode.setNodeName("节点" + groupNo + "执行");
+                    
+                    if (completedItems == totalItems) {
+                        // 所有子任务都完成
+                        pipelineNode.setStatus("completed");
+                        pipelineNode.setTime(completeTime);
+                        pipelineNode.setComment("已完成 " + completedItems + "/" + totalItems + " 项");
+                    } else if (completedItems > 0 || inProgressItems > 0) {
+                        // 有进行中的子任务
+                        pipelineNode.setStatus("pending");
+                        pipelineNode.setComment("进行中 " + (completedItems + inProgressItems) + "/" + totalItems + " 项");
+                    } else if (pendingApprovalItems > 0) {
+                        // 等待审批
+                        pipelineNode.setStatus("pending");
+                        pipelineNode.setComment("待审批 " + pendingApprovalItems + " 项");
+                    } else {
+                        // 等待中
+                        pipelineNode.setStatus("waiting");
+                        pipelineNode.setComment("等待前置节点完成");
+                    }
+                    
+                    if (receiverName != null) {
+                        pipelineNode.setOperatorName(receiverName);
+                    }
+                    
+                    timeline.add(pipelineNode);
+                }
+            }
         }
         
         return timeline;