diff --git a/flows/shared/db.py b/flows/shared/db.py
index b76a998..76b1c6d 100644
--- a/flows/shared/db.py
+++ b/flows/shared/db.py
@@ -25,8 +25,9 @@ LOOKUP_BATCH = 10000
 # 单锁无环,写事务之间从结构上不可能死锁。1768851058 = "inkr" 的 ASCII 整数表示。
 DB_WRITE_LOCK_KEY = 1768851058
 LOCK_TIMEOUT = "15s"                          # 等锁超时 → LockNotAvailable → 交给重试兜底
-WRITE_RETRIES = 3                             # 死锁/等锁超时的整事务重试次数
-WRITE_RETRY_BACKOFF = [1, 3, 7]               # 重试退避(秒)
+WRITE_RETRIES = 5                             # 死锁/等锁超时的整事务重试次数(外部写者如 17track
+                                              # 物流回写不走 advisory 锁,冲突窗口可达分钟级,重试需够深)
+WRITE_RETRY_BACKOFF = [1, 3, 7, 15, 30]       # 重试退避(秒;末位预留,最后一次失败直接抛出)
 WRITE_RETRYABLE_ERRORS = (pg_errors.DeadlockDetected, pg_errors.LockNotAvailable)