Conventional model predictive torque control (MPTC) of permanent magnet synchronous motor (PMSM) does not concern decreasing switching number, which causes high average switching frequency. The decrease of switching number is considered in the MPTC of surface permanent magnet synchronous motor (SPMSM) as one of the control objects of cost function, and weight coefficient of switching number is designed. The MPTC strategy with dynamic weight coefficient based on fuzzy control is proposed. The effect of different motor torque on switching number weight coefficient is analyzed. Fuzzy control is introduced to adjust the weight coefficient of switching number in real time according to motor system states. Simulation results show that compared with constant weight coefficient of switching number, dynamic weight coefficient based on fuzzy control can reduce the average switching frequency and suppress the torque ripple and flux linkage ripple of system.