diff --git a/library/think/Model.php b/library/think/Model.php
index 5137d97f..5d050c51 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -380,7 +380,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 if (empty($param)) {
                     $value = (float) $value;
                 } else {
-                    $value = (float) number_format($value, $param);
+                    $value = (float) number_format($value, $param, '.', '');
                 }
                 break;
             case 'boolean':
@@ -488,7 +488,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 if (empty($param)) {
                     $value = (float) $value;
                 } else {
-                    $value = (float) number_format($value, $param);
+                    $value = (float) number_format($value, $param, '.', '');
                 }
                 break;
             case 'boolean':