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With the proposed ship pod concept and permanent magnet motor and control technology, permanent magnet synchronous motor rapidly applied to ship power propulsion systems. In view of the phenomenon that the speed and torque of marine motor fluctuate in the course of the transition, space vector pulse width modulation scheme is introduced. Combined with the mathematical model of permanent magnet synchronous motor and hull-propeller model, simulation model of marine permanent magnet synchronous motor based on space vector pulse width modulation strategy is built. The simulation results show that the space vector pulse width modulation method can effectively reduce the torque ripple, and the motor propulsion system has a good dynamic response effect. It provides a new way of thinking for the research of marine electric propulsion system.