diff --git a/app/services/daily_report_service.py b/app/services/daily_report_service.py
index 50654a2..95e3c9e 100644
--- a/app/services/daily_report_service.py
+++ b/app/services/daily_report_service.py
@@ -2,11 +2,12 @@
 每日告警日报定时推送服务
 
 每天定时生成前一天的告警汇总，发送到企微群聊。
+支持按边缘节点分组统计。
 """
 import asyncio
-from datetime import datetime, timedelta
-from collections import Counter
-from typing import Dict, List, Optional, Tuple
+from collections import Counter, defaultdict
+from datetime import timedelta
+from typing import Dict, List, Optional
 
 from app.utils.logger import logger
 from app.config import settings
@@ -22,8 +23,29 @@ ALARM_TYPE_NAMES = {
 WEEKDAY_NAMES = ["周一", "周二", "周三", "周四", "周五", "周六", "周日"]
 
 
+def _get_edge_name_map() -> Dict[str, str]:
+    """从 EdgeDevice 表获取 edge_node_id → device_name 映射"""
+    from app.models import get_session, EdgeDevice
+    db = get_session()
+    try:
+        devices = db.query(EdgeDevice.device_id, EdgeDevice.device_name).all()
+        return {d.device_id: (d.device_name or d.device_id) for d in devices}
+    except Exception as e:
+        logger.warning(f"查询边缘设备名称失败: {e}")
+        return {}
+    finally:
+        db.close()
+
+
+def _format_resp_time(minutes: float) -> str:
+    """格式化响应时长"""
+    if minutes < 60:
+        return f"{minutes:.1f}分钟"
+    return f"{minutes / 60:.1f}小时"
+
+
 async def generate_daily_report() -> Optional[str]:
-    """生成昨日告警日报 Markdown 内容"""
+    """生成昨日告警日报 Markdown 内容（含按边缘节点分组）"""
     from app.services.alarm_event_service import get_alarm_event_service
     from app.services.camera_name_service import get_camera_name_service
     from app.utils.timezone import beijing_now
@@ -36,7 +58,7 @@ async def generate_daily_report() -> Optional[str]:
     yesterday_start = today_start - timedelta(days=1)
     day_before_start = today_start - timedelta(days=2)
 
-    # 查询昨日和前日全量告警（page_size 设大，拿全量）
+    # 查询昨日和前日全量告警
     yesterday_alarms, yesterday_total = svc.get_alarms(
         start_time=yesterday_start, end_time=today_start, page=1, page_size=10000
     )
@@ -44,17 +66,18 @@ async def generate_daily_report() -> Optional[str]:
         start_time=day_before_start, end_time=yesterday_start, page=1, page_size=1
     )
 
+    date_str = yesterday_start.strftime("%m-%d")
+    weekday = WEEKDAY_NAMES[yesterday_start.weekday()]
+
     # 无告警时发送简短通知
     if yesterday_total == 0:
-        date_str = yesterday_start.strftime("%m-%d")
-        weekday = WEEKDAY_NAMES[yesterday_start.weekday()]
         return (
             f"**AI安防日报 — {date_str}（{weekday}）**\n\n"
             f">昨日告警总计：**0** 条\n"
             f">系统运行正常，无异常事件"
         )
 
-    # ---- 统计 ----
+    # ---- 全局统计 ----
     type_counter: Counter = Counter()
     device_counter: Counter = Counter()
     handle_done = 0
@@ -63,11 +86,17 @@ async def generate_daily_report() -> Optional[str]:
     false_alarm = 0
     response_times: List[float] = []
 
+    # ---- 按边缘节点分组 ----
+    edge_groups: Dict[str, List] = defaultdict(list)
+
     for a in yesterday_alarms:
         type_counter[a.alarm_type] += 1
         device_counter[a.device_id] += 1
 
-        # 处理状态统计
+        # 按 edge_node_id 分组（无 edge_node_id 归入 "unknown"）
+        edge_key = a.edge_node_id or "unknown"
+        edge_groups[edge_key].append(a)
+
         if a.handle_status == "DONE":
             handle_done += 1
         elif a.handle_status == "IGNORED":
@@ -75,14 +104,12 @@ async def generate_daily_report() -> Optional[str]:
         else:
             handle_unhandled += 1
 
-        # 误报统计
         if a.alarm_status == "FALSE":
             false_alarm += 1
 
-        # 响应时长（从 event_time 到 handled_at）
         if a.handled_at and a.event_time:
             delta = (a.handled_at - a.event_time).total_seconds() / 60.0
-            if delta >= 0:
+            if 0 <= delta <= 360:  # 排除 >6h 异常值
                 response_times.append(delta)
 
     # 环比变化
@@ -98,28 +125,28 @@ async def generate_daily_report() -> Optional[str]:
         change_str = "前日无告警"
 
     # 平均响应时长
-    if response_times:
-        avg_resp = sum(response_times) / len(response_times)
-        if avg_resp < 60:
-            resp_str = f"{avg_resp:.1f}分钟"
-        else:
-            resp_str = f"{avg_resp / 60:.1f}小时"
-    else:
-        resp_str = "暂无数据"
+    resp_str = _format_resp_time(sum(response_times) / len(response_times)) if response_times else "暂无数据"
 
     # 设备 Top5 — 批量获取摄像头名称
     top5_devices = device_counter.most_common(5)
-    device_ids = [d[0] for d in top5_devices]
+    all_device_ids = list({d[0] for d in top5_devices})
+    # 也收集各边缘节点的 top 设备 ID
+    for edge_key, alarms in edge_groups.items():
+        edge_dev_counter = Counter(a.device_id for a in alarms)
+        for dev_id, _ in edge_dev_counter.most_common(3):
+            if dev_id not in all_device_ids:
+                all_device_ids.append(dev_id)
+
     try:
-        name_map = await camera_svc.get_display_names_batch(device_ids)
+        name_map = await camera_svc.get_display_names_batch(all_device_ids)
     except Exception as e:
         logger.warning(f"日报获取摄像头名称失败: {e}")
         name_map = {}
 
-    # ---- 组装 Markdown ----
-    date_str = yesterday_start.strftime("%m-%d")
-    weekday = WEEKDAY_NAMES[yesterday_start.weekday()]
+    # 边缘设备名称映射
+    edge_name_map = _get_edge_name_map()
 
+    # ==================== 组装 Markdown ====================
     lines = [
         f"**AI安防日报 — {date_str}（{weekday}）**",
         "",
@@ -145,6 +172,46 @@ async def generate_daily_report() -> Optional[str]:
             display_name = name_map.get(device_id, device_id)
             lines.append(f">{i}. {display_name} — {count}条")
 
+    # ---- 按边缘节点分组汇总 ----
+    if len(edge_groups) > 1 or (len(edge_groups) == 1 and "unknown" not in edge_groups):
+        lines.append("")
+        lines.append("**各边缘节点汇总**")
+
+        # 按告警数降序排列
+        sorted_edges = sorted(edge_groups.items(), key=lambda x: len(x[1]), reverse=True)
+
+        for edge_key, alarms in sorted_edges:
+            edge_name = edge_name_map.get(edge_key, edge_key)
+            if edge_key == "unknown":
+                edge_name = "未知节点"
+
+            edge_total = len(alarms)
+            edge_type_counter = Counter(a.alarm_type for a in alarms)
+            edge_unhandled = sum(1 for a in alarms if a.handle_status not in ("DONE", "IGNORED"))
+            edge_false = sum(1 for a in alarms if a.alarm_status == "FALSE")
+
+            # 类型分布简写
+            type_parts = []
+            for at, ac in edge_type_counter.most_common():
+                type_parts.append(f"{ALARM_TYPE_NAMES.get(at, at)}{ac}条")
+            type_summary = "、".join(type_parts)
+
+            # 该节点的 Top3 摄像头
+            edge_dev_counter = Counter(a.device_id for a in alarms)
+            top3 = edge_dev_counter.most_common(3)
+            cam_parts = []
+            for dev_id, dev_count in top3:
+                cam_name = name_map.get(dev_id, dev_id)
+                cam_parts.append(f"{cam_name}({dev_count})")
+            cam_summary = "、".join(cam_parts)
+
+            lines.append(f"")
+            lines.append(f">{edge_name}：<font color=\"warning\">{edge_total}</font> 条")
+            lines.append(f">　类型：{type_summary}")
+            if edge_unhandled > 0:
+                lines.append(f">　待处理：<font color=\"warning\">{edge_unhandled}</font> 条　误报：{edge_false}条")
+            lines.append(f">　Top设备：{cam_summary}")
+
     return "\n".join(lines)