The utility model relates to a reliability testing stand of a vacuum toilet system, which is used for performing reliability tests of a railway passenger train vacuum toilet system. The testing stand comprises a clear water tank, a console, a display station and pipelines, etc. The clear water tank and the vacuum toilet system to be detected are connected through the pipelines to form a circulation loop. The console and the vacuum toilet system to be detected are connected through hard wires or in a communicating way. The display station and the console are connected through a circuit. The reliability testing stand has the characteristics of strong applicability, comprehensive monitoring signals, high intelligentization degree, convenient operation and convenient use. The testing stand which can monitor the working state of the vacuum toilet system to be detected also monitors the running state of its own system and achieves different alarm indications. The testing stand which treats faults in a categorized way automatically generates test detection reports. The testing stand which does not require a man to be on duty can automatically continuously work.