The invention discloses a finite state machine with a radiating resistant function for a reconfigurable satellite-loaded computer and relates to the technical field of aerospace. The invention solves the problem of integral function invalidation of the reconfigurable satellite-loaded computer because the traditional reconfigurable satellite-loaded computer is short of resistance on space radiation. The finite state machine comprises an FPGA (Field Programmable Gate Array), a counter circuit and a timer circuit, wherein the FPGA comprises a selector, a register, a Hamming code checking circuit, a switch circuit and an in-chip dual-port RAM (Random Access Memory); the timer circuit is respectively connected with the counter circuit, the selector and the switch circuit; the counter circuit is also connected with the selector; the selector is also connected with the Hamming code checking circuit, the in-chip dual-port RAM and the register; the register is also connected with the in-chip dual-port RAM; the in-chip dual-port RAM is also connected with the Hamming code checking circuit; and the Hamming code checking circuit is also connected with the switch circuit. The invention is suitable for the reconfigurable satellite-loaded computer.