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A movement law of laser beam facula is designed for the injection trajectory of hyper-velocity kinetic energy missile to eliminate the influence of motor exhaust smoke on laser signal transmission.Taking guidance loop of hyper-velocity kinetic energy missile as plant,a closed loop control system with desired step response characteristics is constructed and the movement law of laser beam facula for the missile injection trajectory is designed based on the output signal of the closed loop controller under a step input.Six degree-of-freedom trajectory simulations show that by the guidance of the laser beam facula moving with designed law,the missile can finish transition from the initial trajectory to a stable tracking trajectory without overshoot within the required time.