diff --git a/backend/qqwryUpdate.sh b/backend/qqwryUpdate.sh
index 1f9aab2..e81f1de 100755
--- a/backend/qqwryUpdate.sh
+++ b/backend/qqwryUpdate.sh
@@ -27,6 +27,13 @@ if (\$fp) {
 EOF
 
 php unlock.php
+
+file_size=`du -b qqwry.dat | awk '{print $1}'`
+if [ $file_size = "0" ]; then
+    echo "qqwry.dat update fail."
+    exit
+fi
+
 cd ..
 cp -f temp/qqwry.dat qqwry.dat
 rm -rf temp/