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Aiming at the requirement of intelligent, miniaturized and universal for the key electronic products of launch vehicle, a time serier controller based on MOSFET is designed. The hardware and software design scheme is introduced, and the security design measures are adopted in the hardware circuit design. This paper describes the time serier controller receiving flight control computer instruction by custom high-speed serial bus in different states, control the explosive initiator detonation, solenoid valve on and off, and achieve energy-saving use of solenoid valve. In the process of testing and flight, the time serier acquisition can be carried out, and the health management can be fed back to the flight control computer by serial bus. In the circuit resistance test, the resistance value of the pyrotechnic circuit can be tested under the absolute safety environment. The timing controller takes part in the environmental test, the system test and the flight test of launch vehicle. The timing collection parameters meet the requirements of the launch vehicle flight timing, and the products work normally, which ensures the successful flight test of launch vehicle.