Abstract: By summing up the domestic and foreign simulation study of aircraft power supply system,this paper designed a simulation model of an aircraft variable frequency AC power supply system based on LabVIEW.By setting the state of each part in the power supply system,the dynamic reconfiguration process of the power supply structure when the power state changes would be simulated,and the protecting action after various fault conditions occurs could be verified,the correctness of the power supply logic could also be verified.The demonstration results show that this software fits the design requirements quite well,ensuring the reliable operation of the power supply system.