diff --git a/mqttc.py b/mqttc.py
index a299740..c963133 100644
--- a/mqttc.py
+++ b/mqttc.py
@@ -30,6 +30,7 @@ logging.basicConfig(level=getattr(logging, conf.LOG_LEVEL.upper(), logging.INFO)
 logger = logging.getLogger(__name__)
 
 engine:Engine = None
+mpoint_dict = {} # {"mpoint_id": last_timex}
 
 def send_error_email(message, subject='hfnf_mqtt', ):
     msg = MIMEMultipart()
@@ -52,6 +53,9 @@ def save_items(payload):
         for item in item_list:
             data['timex'] = datetime.strptime(item['time'], "%Y%m%d%H%M%S").replace(tzinfo=tz.gettz('Asia/Shanghai'))
             data['mpoint_id'] = item['name']
+            last_timex: datetime = mpoint_dict.get(data['mpoint_id'], None)
+            if last_timex and (data['timex'] - last_timex).total_seconds() < getattr(conf, 'SAVE_SECONDS', 50):
+                continue
             try:
                 val_float = float(item["value"])
                 data["val_float"] = val_float
@@ -68,6 +72,7 @@ def save_items(payload):
                 logger.error(f"{data['mpoint_id']}-保存数据失败", exc_info=True)
                 Thread(target=send_error_email, args=(f"{data['mpoint_id']}-保存数据失败-{e}",)).start()
             conn.commit()
+            mpoint_dict[data['mpoint_id']] = data['timex']