The invention provides a period checking method for a differential pressure transmitter verification device. The method comprises: firstly, a period checking data is calculated according to main standard submitting time; secondly, a checking standard is verified by using a verification device on the period checking data; thirdly, the checking standard is installed on the verification device, the verification device is started by invoking a testing program automatically to test the checking standard, and testing data are uploaded to a background control system uniformly; and fourthly, the background control system carries out an automatic analysis on a performance index of the verification device based on the testing data. The method has the following beneficial effects: the verification device can be tested automatically and regularly to guarantee accuracy and stability of the metering performance of the device; and precise operation of the differential pressure transmitter verification device can be guaranteed effectively and the application prospect of the method is wide.