diff --git a/windmill/sync_shorturl_to_clickhouse.ts b/windmill/sync_shorturl_to_clickhouse.ts
index 9268889..cd29ccc 100644
--- a/windmill/sync_shorturl_to_clickhouse.ts
+++ b/windmill/sync_shorturl_to_clickhouse.ts
@@ -554,6 +554,47 @@ async function insertToClickhouse(data: Record<string, unknown>[]) {
   // 构建INSERT查询
   const columns = Object.keys(data[0]).join(", ");
   
+  // 收集所有记录的ID
+  const recordIds = data.map(record => record.id as string);
+  console.log(`需要处理的记录数: ${recordIds.length}`);
+  
+  // 先删除可能存在的重复记录
+  try {
+    console.log(`删除可能存在的重复记录...`);
+    
+    // 按批次处理删除，避免请求过大
+    const deleteBatchSize = 100;
+    for (let i = 0; i < recordIds.length; i += deleteBatchSize) {
+      const idBatch = recordIds.slice(i, i + deleteBatchSize);
+      const formattedIds = idBatch.map(id => `'${id}'`).join(', ');
+      
+      const deleteQuery = `
+        ALTER TABLE shorturl_analytics.shorturl
+        DELETE WHERE id IN (${formattedIds})
+      `;
+      
+      const response = await fetch(chConfig.clickhouse_url, {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/x-www-form-urlencoded",
+          "Authorization": `Basic ${btoa(`${chConfig.clickhouse_user}:${chConfig.clickhouse_password}`)}`
+        },
+        body: deleteQuery,
+      });
+      
+      if (!response.ok) {
+        const errorText = await response.text();
+        console.warn(`删除记录时出错 (批次 ${i/deleteBatchSize + 1}): ${errorText}`);
+        // 继续执行，不中断流程
+      } else {
+        console.log(`成功删除批次 ${i/deleteBatchSize + 1}/${Math.ceil(recordIds.length/deleteBatchSize)}的潜在重复记录`);
+      }
+    }
+  } catch (error) {
+    console.warn(`删除重复记录时出错: ${(error as Error).message}`);
+    // 继续执行，不因为删除失败而中断整个过程
+  }
+
   const query = `
     INSERT INTO shorturl_analytics.shorturl (${columns})
     FORMAT JSONEachRow