diff --git a/application/third_party/tuniu/controllers/tuniu_train.php b/application/third_party/tuniu/controllers/tuniu_train.php
index 7a254903..6c8c79d7 100644
--- a/application/third_party/tuniu/controllers/tuniu_train.php
+++ b/application/third_party/tuniu/controllers/tuniu_train.php
@@ -61,26 +61,35 @@ class Tuniu_train extends CI_Controller{
 					"data": { "trainDate": "'.$date.'", "fromStation": "'.$fromStation.'", "toStation": "'.$toStation.'", "trainCode": "" } 
 					}';		
 			$back_data = post_tuniu($url,$post_data,$method = 'POST');
-
+			
+			//print_r(json_decode($back_data));die();
+			
 			//如果数据为空则调用缓存,有数据则进行数据存储
 			if(empty($back_data)){
 				log_message('error','tuniutrain 接口未响应|数据源:'.$fromStation.'|'.$toStation.'|'.$date);
-				$trainCache = $this->tuniuprice_model->get_train_cache($fromStation,$toStation);
-				$back_data = $trainCache->tpc_content;
-				$isCache = true;
+				if($differ <= 5){
+					$back_data = null;
+				}else{
+					$trainCache = $this->tuniuprice_model->get_train_cache($fromStation,$toStation);
+					$back_data = $trainCache->tpc_content;
+					$isCache = true;
+				}
 			}else{
 				if(empty(json_decode($back_data)->data)){
 					$error = json_decode($back_data);
-					$trainCache = $this->tuniuprice_model->get_train_cache($fromStation,$toStation);
-					if(!empty($trainCache)){
-						$back_data = $trainCache->tpc_content;
-						$isCache = true;
-						log_message('error','tuniutrain 查询出错|'.$error->errorMsg);
-					}else{
+					if($error->returnCode == '201'){
 						$back_data = null;
-						log_message('error','tuniutrain 缓存为空|'.$fromStation.'|'.$toStation.'|'.$date);
+					}else{
+						$trainCache = $this->tuniuprice_model->get_train_cache($fromStation,$toStation);
+						if(!empty($trainCache)){
+							$back_data = $trainCache->tpc_content;
+							$isCache = true;
+							log_message('error','tuniutrain 查询出错|'.$error->errorMsg);
+						}else{
+							$back_data = null;
+							log_message('error','tuniutrain 缓存为空|'.$fromStation.'|'.$toStation.'|'.$date);
+						}
 					}
-					
 				}else{
 					$this->tuniuprice_model->addOrUpdate($fromStation,$toStation,$back_data);
 				}