diff --git a/application/controllers/keyworlds.php b/application/controllers/keyworlds.php
index 61769f65..11d7c9a6 100644
--- a/application/controllers/keyworlds.php
+++ b/application/controllers/keyworlds.php
@@ -102,7 +102,7 @@ class Keyworlds extends CI_Controller {
                     $data['rank_json'] .='{"name":"' . $ra[$data_time[0]]->kw_keyworlds . '","data":[';
                     // 每个点
                     foreach ($ra as $v) {
-                        $kwr_rank = $v->kwr_rank;
+                        $kwr_rank = $v->kwr_rank ? $v->kwr_rank : 'null';
                         if ($v->kwr_rank == '>150') {
                             $kwr_rank = 100;
                         }