diff --git a/src/share/parameter/ob_parameter_seed.ipp b/src/share/parameter/ob_parameter_seed.ipp
index 1afc6c032..159a0d6fe 100644
--- a/src/share/parameter/ob_parameter_seed.ipp
+++ b/src/share/parameter/ob_parameter_seed.ipp
@@ -885,7 +885,7 @@ DEF_INT(_migrate_block_verify_level, OB_CLUSTER_PARAMETER, "1", "[0,2]",
         "2 : logical verification",
         ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));
 
-DEF_TIME(_cache_wash_interval, OB_CLUSTER_PARAMETER, "200ms", "[1ms, 1m]",
+DEF_TIME(_cache_wash_interval, OB_CLUSTER_PARAMETER, "200ms", "[1ms, 3s]",
         "specify interval of cache background wash",
         ObParameterAttr(Section::OBSERVER, Source::DEFAULT, EditLevel::DYNAMIC_EFFECTIVE));