diff --git a/etc/param/ffrt.para b/etc/param/ffrt.para
index 1b7974a934f9beb9fe23c1e12459f7e1435f2004..5ac9dd23f4af45f0d346397e8c7f73d3fc784fd5 100644
--- a/etc/param/ffrt.para
+++ b/etc/param/ffrt.para
@@ -20,3 +20,4 @@ persist.ffrt.interval.appRate=0
 persist.ffrt.interval.rsRate=0
 persist.qosmanager.setQos.on=true
 persist.qos.configReadLog = false
+persist.ddl.sceneboardWorker = 0
diff --git a/etc/param/ffrt.para.dac b/etc/param/ffrt.para.dac
index 1eabbde8263f06ff71ffc4272bfaf5d48de669b3..37002d692a3a86aefbbb5342de26165b6680ecab 100644
--- a/etc/param/ffrt.para.dac
+++ b/etc/param/ffrt.para.dac
@@ -20,3 +20,4 @@ persist.ffrt.interval.appRate = system:system:0664
 persist.ffrt.interval.rsRate = system:system:0664
 persist.qosmanager.setQos.on = system:system:0664
 persist.qos.configReadLog = system:system:0664
+persist.ddl.sceneboardWorker = system:system:0664
diff --git a/interfaces/inner_api/concurrent_task_type.h b/interfaces/inner_api/concurrent_task_type.h
index 0ea1a377c7336e7d0ef554480fe1ae96c5463411..8bb0e3c4cf1f9a3ebb184eb3557cedeea79fa186 100644
--- a/interfaces/inner_api/concurrent_task_type.h
+++ b/interfaces/inner_api/concurrent_task_type.h
@@ -33,6 +33,7 @@ enum MsgType {
     MSG_LOSE_FOCUS,
     MSG_ENTER_INTERACTION_SCENE,
     MSG_EXIT_INTERACTION_SCENE,
+    MSG_SCB_WORKER_EVENT,
     MSG_SUB_FOCUS,
     MSG_GROUP_CHANGE,
     MSG_SYSTEM_MAX,