Abstract:The Prognostics and Health Management (PHM) system is an important tool to ensure the stable and safe of equipment. By constructing PHM simulation test system, the system architecture, bus interface, data processing, partition storage and other system functions can be simulated and verified, so as to find out all kinds of problems in the initial design of PHM system as soon as possible, improve and optimize the scheme in time, and reduce the risk of system development. A study was conducted on the design of a PHM simulation test system and application method, which introduces the composition and functional design of the simulation test system from the overall level, software and hardware design. The simulation equipment of aircraft level and regional level is built, the cross-linked simulation network based on bus communication is constructed, and the simulation of data, model and process are supported. The practical application shows that this method can support the simulation verification test, shorten the test period, improve the development efficiency, and provide the support for the design of PHM system from the point of view of PHM system function verification.