Abstract: In order to implement precise and rapid synchronization, a platform of TMR computer using SOPC is built. Based on the traditional task synchronization, the new TMR system not can achieve precise synchronization,but also make the synchronization time much shorter(about 150 ns),which benefit from the hardware structure of FPGA and close cooperation between the hardware and software. At the same time, a high reliability can be achieved because of the precise fault-detection mechanism.