The invention discloses a brushless direct current motor phase change torque pulsation restraining method based on current prediction control. A control system adopted by the method is a double-closed-loop control system, wherein an outer loop is a speed loop, the inner loop adopts a current prediction controller to be used as a current loop, and the phase change torque pulsation is restrained; the position of a motor rotor is determined according to a hall signal of a hall sensor, and the rotation speed calculation is completed; an outer loop speed regulator is used for adjusting the error tooutput an inner loop current given value; and the current given value output by the outer-loop speed controller is compared with the inner-loop current feedback value to pass through the current prediction controller, and by combining the position signal of the motor rotor, PWM duty ratio is output, so that turn-on and turn-off of the corresponding power tubes are controlled. According to the method disclosed by the invention, the phase-change torque pulsation can be effectively inhibited within a full-speed range, the algorithm is simple, and the implementation is easy, and the method is high in adaptability and obvious in effect, and can be well embedded into a phase change period, so that the phase-change torque pulsation can be effectively inhibited.