diff --git a/script/gs_preinstall b/script/gs_preinstall
index 02249255ecd19a9bdb904866310186eb6c86b608..655c66e8f8e472a4234a2ef2fdb0a8326b07cfd4 100644
--- a/script/gs_preinstall
+++ b/script/gs_preinstall
@@ -97,6 +97,7 @@ General options:
         --skip-hostname-set            Whether to skip hostname setting.
                                        (The default value is set.)
     -l                                 Path of log file.
+        --delete-root-trust            Delete the mutual trust
     -?, --help                         Show help information for this
                                        utility, and exit the command line mode.
     -V, --version                      Show version information.
diff --git a/script/impl/preinstall/PreinstallImpl.py b/script/impl/preinstall/PreinstallImpl.py
index 145f4a7b79b6cdf63353db9c29f1578f80cf540d..cd1c0bcbc3c4f4e71c961b093d8941161d93616c 100644
--- a/script/impl/preinstall/PreinstallImpl.py
+++ b/script/impl/preinstall/PreinstallImpl.py
@@ -1579,7 +1579,8 @@ class PreinstallImpl:
         # indicate that the preinstall.py has been execed succeed
         self.doPreInstallSucceed()
         # delete root mutual trust
-        self.delete_root_mutual_trust()
+        if self.context.root_delete_flag == True:
+            self.delete_root_mutual_trust()
 
         self.context.logger.log("Preinstallation succeeded.")