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 with 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 items 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.