diff --git a/library/think/db/Connection.php b/library/think/db/Connection.php
index 578cc8f9..6e17cf34 100644
--- a/library/think/db/Connection.php
+++ b/library/think/db/Connection.php
@@ -483,7 +483,7 @@ abstract class Connection
             if (PDO::PARAM_STR == $type) {
                 $value = $this->quote($value);
             } elseif (PDO::PARAM_INT == $type) {
-                $value = (float) $value;
+                $value = sprintf("%d", $value);
             }
             // 判断占位符
             $sql = is_numeric($key) ?