In this paper, aim at the problem of the large torque ripple of motor, a novel topology structure of permanent magnet squarewave motor based on two stage matrix converter is proposed, which uses double closedloop control. By detecting the stator terminal voltage to determine the duration of the PWM modulation strategy, the PWM modulation strategy is proposed, which can be accurately determined at low speed or high speed, The control strategy realizes the direct AC to AC control of the permanent magnet squarewave motor and makes the input power factor close to 1, and the current energy flow is bidirectional. The MATLAB simulation results show that the output current of the motor is close to the rectangular wave, the torque ripple is suppressed, the speed tracking is accurated, and the correctness and effectiveness of the proposed control strategy is verified.