diff --git a/source/application/api/controller/PassengerFlow/PassengerFlow.php b/source/application/api/controller/PassengerFlow/PassengerFlow.php
index acdedd5..e6904c9 100644
--- a/source/application/api/controller/PassengerFlow/PassengerFlow.php
+++ b/source/application/api/controller/PassengerFlow/PassengerFlow.php
@@ -16,6 +16,7 @@ class PassengerFlow extends Controller
      */
     public function allGroupTimeNum($granularity) {
 
+        $granularity = $this->postData('granularity');
         if (empty($granularity)) $this->renderError('date参数不能为空');
 
         $allTimeData = [];