diff --git a/service/BUILD.gn b/service/BUILD.gn
index 81e67ef208a4e2007fe2c24ca4e7f9d9b8d1b0b9..3f023c494f23ef4cf8d3d799432c55408d9d8fab 100644
--- a/service/BUILD.gn
+++ b/service/BUILD.gn
@@ -77,6 +77,18 @@ ohos_shared_library("displaymgrservice") {
     "window_manager:libdm",
   ]
 
+  cflags = [
+    "-fvisibility=hidden",
+    "-fdata-sections",
+    "-ffunction-sections",
+    "-Os",
+  ]
+
+  cflags_cc = [
+    "-fvisibility-inlines-hidden",
+    "-Os",
+  ]
+
   part_name = "${displaymgr_part_name}"
 }