An avionics software distributed testing platform based on Integrated Modular Avionics (IMA) is described. There are two types of the platform nodes, Server and Client. They are connected by using the Internet. Using Java technologies, Client constructs the submission of the test assignments and the result access. Coordinating w让h the target machine, Server can realize the dispatching management of the test assignments, the automatic compiling, linking, loading, and executing of the test programs, and the storage and collection of the test results. Resource sharing of the limited IMA hardware can be realized on this platform. The resources utilization rate and the testing efficiency are increased, and an effective and complete test of the configuration 让ems or the system of IMA software can be carried out. The testing platform supplies an effective solution to the long-distance testing of IMA avionics software.