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A certain fighter can launch four types of air-to-air missile and launchers, more than four missiles can be mounted at one time. In the test before flying, there are many problems such as multiple signals to be tested, low test efficiency, and the need for multiple missile-type test equipment. The modular method is used to design a type of tester, which is composed of PC104 control platform, four DSP-based test terminals, GPS processing module, data link/RF processing module, dual displays, etc. and realizes four bomb simulation and interface testing, four mount points parallel test, GPS signal test, RF/data link channel test and other functions, satisfies the test requirements of this fighter before hanging missile. Improve tester usability through interface reuse design and dual display design. After equipping, the test time of four hanging points is less than 10 minutes, the missile type/hanging point switching time is less than 3 minutes, the failure detection rate is greater than 97%, and more than four types of testers functions are integrated to one, which achieves cost reduction and benefit improvement.