In order to improve the dynamic response performance of direct-drive permanent magnet synchronous motor (DD-PMSM), an improved deadbeat direct torque control (DB-DTC) strategy is proposed. On the basis of retaining the dynamic response performance of traditional DB-DTC, the improved DB-DTC simplifies the control process and reduces the amount of real-time calculation. The control effects of traditional DB-DTC and improved DB-DTC are compared by building a simulation model in MATLAB/Simulink, and the advantages of the proposed control strategy are verified by combining the improved DB-DTC with the position type impedance control strategy. The simulation results show that in the position control mode, compared with the traditional DB-DTC, the time required for the motor to rotate to a given angle and decelerate to zero speed is reduced by 0.002 s, and the steady-state operation angle error is reduced by 0.02°. In the speed control mode, compared with the traditional DB-DTC, the time to reach the given speed is reduced by 0.004 s, the steady-state speed error is reduced by 0.03 r/min, and the steady-state speed fluctuation is reduced by 0.06 r/min. After the motor enters steady-state operation, the q axis peak current is reduced by 0.193 A, and the pulsation of q axis current is reduced by 0.204 A. The motor control system has better dynamic performance and stronger anti-interference ability.