diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 49b5d95..312c95c 100644
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -339,6 +339,18 @@ _main() {
 			export PGPASSWORD="${PGPASSWORD:-$POSTGRES_PASSWORD}"
 			docker_temp_server_start "$@"
 
+			# 创建 postgres 超级管理员（如果不存在）
+			docker_process_sql <<-EOSQL
+			DO \$\$
+			BEGIN
+				IF NOT EXISTS (SELECT FROM pg_roles WHERE rolname = 'postgres') THEN
+				CREATE ROLE postgres SUPERUSER LOGIN PASSWORD '${POSTGRES_PASSWORD}';
+				ALTER DATABASE ${POSTGRES_DB} OWNER TO postgres;
+				END IF;
+			END
+			\$\$;
+			EOSQL
+
 			docker_setup_db
 			docker_process_init_files /docker-entrypoint-initdb.d/*