flight control computer executes the synchronization operation to guarantee the unisonal work among N channels, and then complete some basic action of the same task at the same time in a moment. Only in this way, the voting process of the faulttolerance makes sense and can ensure the majority voting of system redundant modules. Furthermore, RFM is also used to cross-translate large amount of data among channels. When the data of one channel is wrong, other data can be shared to access the right information. The host computer of flight control computers sends control instructions and fault injection data to flight control computer group through TCP/IP protocol to realize the real-time monitoring and fault injecting.