The fusion of real-time and fault tolerant is needed to solve the problem of dependability for the critical mission distributed system, and the real-time fault tolerant middleware was proposed. The difficult for the fusion of real-time and fault tolerant was analyzed,the idea and architecture of the real-time fault tolerant CORBA middleware was put forward, and then the service oriented, three-layer, and real-time fault tolerant middleware model, and it’s detailed design were presented, including the design of the component of the middle layer and the sever layer, admission test, task assignment algorithm and scheduling service, which provides a platform to deal with critical mission in distributed system.
