diff --git a/webapp/controller/BlockChainController.class.php b/webapp/controller/BlockChainController.class.php
index e9bd5012..3b1e811e 100644
--- a/webapp/controller/BlockChainController.class.php
+++ b/webapp/controller/BlockChainController.class.php
@@ -321,6 +321,10 @@ class BlockChainController extends BaseAuthedController {
             $rate = 10;
         }
         $jinDu = BlockChainService::getCurrencyDecimals($tokenType);
+        if ($jinDu === false) {
+            myself()->_rspErr(1, "token_type error");
+            return;
+        }
         $currency = $tokenType;
         $price = BlockChainService::formatCurrencyEx($num, $jinDu);