diff --git a/xCAT-buildkit/bin/buildkit b/xCAT-buildkit/bin/buildkit
index c9c4b6d13..08d3e51e5 100755
--- a/xCAT-buildkit/bin/buildkit
+++ b/xCAT-buildkit/bin/buildkit
@@ -3892,6 +3892,47 @@ sub NEW_kit_addpkgs
         }
     }
 
+
+    #When using -k -r, there are useless repodir
+    #delete useless repo dir
+    my $kitrepodirby=$::base_repodir;
+    my $cmdby = "/bin/ls $kitrepodirby 2>/dev/null";
+    my $outputby = `$cmdby`;
+    my @allrepolist = split(/\n/, $outputby);
+    my @dellist;
+    
+    foreach my $reponame (@allrepolist)
+    {
+       my $match=0;
+       foreach my $kr (@{$::bldkit_config->{kitrepo}{entries}})
+       {
+       my $repodirname = "$kr->{kitreponame}";
+
+           if ( ${repodirname} eq ${reponame} )
+           {
+                ${match}++;
+           }
+       }
+       if ( ${match} == 0 )
+       {
+          push(@dellist,$reponame);
+       }
+    }
+
+    foreach my $del (@dellist)
+    {
+        my $delrepodir=$::base_repodir."/".$del ;
+        if ( -d $delrepodir )
+        {
+           my $delcmd="rm -Rf $delrepodir";
+           if ( system($delcmd) )
+           {
+              print "Failed to delete useless repo directory \n";
+           }
+        }
+    }
+
+
     # Build the full kit tar file
     my $buildtar_rc = &kit_buildtar;