diff --git a/src/pipelines/dbf_to_postgres_ctllog_pwc.py b/src/pipelines/dbf_to_postgres_ctllog_pwc.py
index 5957386..494a8d5 100644
--- a/src/pipelines/dbf_to_postgres_ctllog_pwc.py
+++ b/src/pipelines/dbf_to_postgres_ctllog_pwc.py
@@ -33,6 +33,7 @@ class DbfToPostgresCtllogPwcPipeline(BasePipeline):
         self.group_cache = {}
         self.batch_size = int(os.getenv('BATCH_SIZE', 1000))
         self.batch_data = []
+        self.seen = set()  #用于去重
         self.processed_records = 0
         self.current_date = None  # 当前处理的日期
 
@@ -158,12 +159,10 @@ class DbfToPostgresCtllogPwcPipeline(BasePipeline):
 
                 created_str = created.strftime('%Y-%m-%d %H:%M:%S') + '+00'
 
-                self.batch_data.append((
-                    created_str,
-                    mapping['control_group_controller_id'],
-                    mapping['controller_point_id'],
-                    real_value
-                ))
+                key = (created_str, mapping['control_group_controller_id'], mapping['controller_point_id'], real_value)
+                if key not in self.seen:
+                    self.seen.add(key)
+                    self.batch_data.append(key)
 
                 if len(self.batch_data) >= self.batch_size:
                     self.flush_batch()
@@ -195,6 +194,7 @@ class DbfToPostgresCtllogPwcPipeline(BasePipeline):
 
         # 清空批次数据
         self.batch_data = []
+        self.seen.clear()
 
     def final_flush(self):
         # 刷新剩余的批次数据