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The automatic station announcement function of the EMU is realized by the passenger information system, which is mainly responsible for the automatic voice and text broadcast at three times when the train is about to arrive, arrives and stops stably, starts and leaves the station, so as to transmit the train operation station information to passengers. When the station announcement function is developed or modified, and the train number line information is added or modified, the modified contents need to be verified. At present, there are few test methods for the automatic station announcement function of the passenger information system of EMUs. The traditional test method is that the testers add passengers to follow the train and observe the voice and text broadcasts at each station during the train operation, so as to complete the verification of the station announcement function of this train. This test method is very inefficient, depends on the field operating environment, and has poor test regression. In order to ensure the stability of the automatic station announcement function during operation and improve the test efficiency, GPS simulation software is used to simulate the real-time position of the train according to the user"s test instructions, and calculate the distance between the current position of the train and the next station; MVB data receiving and transmitting device is adopted to simulate the sending of train door opening and closing signals and train speed signals according to the user"s test instructions, so as to complete the automatic station announcement test of passenger information system using MVB as the communication mode; With the help of the test method of the automatic station announcement function of EMUs, the test efficiency can be improved and the stable operation of the automatic station announcement function can be guaranteed.