diff --git a/source/dbManager.cpp b/source/dbManager.cpp
index 4b22fd8..9ceb9aa 100644
--- a/source/dbManager.cpp
+++ b/source/dbManager.cpp
@@ -117,6 +117,8 @@ bool DatabaseManager::connect(const QString& strConnectionName)
                             .arg(strConnectionName)
                             .arg(QString::fromLocal8Bit(errorText.toLatin1())));
         emit errorOccurred(strConnectionName, QString::fromWCharArray(L"数据库打开失败，详情可见日志文件"));
+        db.close();
+        db = QSqlDatabase();//重置为无效数据库对象，在下面remove的时候就不会出现"connection '***' is still in use, all queries will cease to work"的警告
         QSqlDatabase::removeDatabase(strConnectionName);
         return false;
     }