The invention provides an automatic regression testing method and device. The method comprises the steps that when a testing task is received, a configuration file corresponding to the testing task isacquired, wherein related information of all testing cases which are needed to be executed to complete the testing task is recorded in the configuration file; according to the related information ofall the testing cases in the configuration file, all the testing cases are executed, and executing results of all the testing cases are obtained; the executing results of all the testing cases are compared with corresponding expected results, and a testing result is obtained. According to the automatic regression testing method, automatic regression testing is achieved, testing personnel do not need to write testing codes at the same time, all functions of the testing cases are completed through the configuration file, the number of the configuration files is small, the automatic regression testing device is convenient to maintain, and the automatic regression testing efficiency is greatly improved.