Reactor protection system of CENTER is based on NASPIC platform developed by NPIC. According to the requirement of GB/T 5204 and IEEE 338, based on the design criterion of periodic test, this paper introduces the overall scheme of periodic test for reactor protection system based on the principle of subsection and overlap as well as the characteristics of the NASPIC platform itself. T1 test, T2 test, T3 test, response time test and their principle are mainly described. This design can be referenced by other reactors.