diff --git a/docker/sync/Dockerfile b/docker/sync/Dockerfile
index 33b8763..ac7ce4c 100644
--- a/docker/sync/Dockerfile
+++ b/docker/sync/Dockerfile
@@ -57,6 +57,7 @@ ENV ALIYUNPAN_PAN_DIR=/sync_drive
 ENV ALIYUNPAN_SYNC_MODE=upload
 ENV ALIYUNPAN_SYNC_POLICY=increment
 ENV ALIYUNPAN_SYNC_DRIVE=backup
+ENV ALIYUNPAN_SYNC_CYCLE=infinity
 ENV ALIYUNPAN_SYNC_PRIORITY=time
 ENV ALIYUNPAN_SYNC_LOG=false
 ENV ALIYUNPAN_LOCAL_DELAY_TIME=3
diff --git a/docker/sync/app.sh b/docker/sync/app.sh
index 1a8524d..952b18c 100755
--- a/docker/sync/app.sh
+++ b/docker/sync/app.sh
@@ -56,4 +56,4 @@ else
   ./aliyunpan config set -file_record_config 2
 fi
 
-./aliyunpan sync start -dp ${ALIYUNPAN_DOWNLOAD_PARALLEL} -up ${ALIYUNPAN_UPLOAD_PARALLEL} -dbs ${ALIYUNPAN_DOWNLOAD_BLOCK_SIZE} -ubs ${ALIYUNPAN_UPLOAD_BLOCK_SIZE} -log ${ALIYUNPAN_SYNC_LOG} -ldt ${ALIYUNPAN_LOCAL_DELAY_TIME}
+./aliyunpan sync start -dp ${ALIYUNPAN_DOWNLOAD_PARALLEL} -up ${ALIYUNPAN_UPLOAD_PARALLEL} -dbs ${ALIYUNPAN_DOWNLOAD_BLOCK_SIZE} -ubs ${ALIYUNPAN_UPLOAD_BLOCK_SIZE} -log ${ALIYUNPAN_SYNC_LOG} -ldt ${ALIYUNPAN_LOCAL_DELAY_TIME} -cycle ${ALIYUNPAN_SYNC_CYCLE}
diff --git a/docker/sync/docker-compose.yml b/docker/sync/docker-compose.yml
index 1e9d127..b32533f 100644
--- a/docker/sync/docker-compose.yml
+++ b/docker/sync/docker-compose.yml
@@ -31,6 +31,8 @@ services:
       - ALIYUNPAN_SYNC_MODE=upload
       # 备份策略: exclusive(排他备份文件，目标目录多余的文件会被删除),increment(增量备份文件，目标目录多余的文件不会被删除)
       - ALIYUNPAN_SYNC_POLICY=increment
+      # 备份周期, 支持两种: infinity(永久循环备份),onetime(只运行一次备份)
+      - ALIYUNPAN_SYNC_CYCLE=infinity
       # 网盘：backup(备份盘), resource(资源盘)
       - ALIYUNPAN_SYNC_DRIVE=backup
       # 是否显示文件备份过程日志，true-显示，false-不显示