Several traditional dualmotor inverter topologies were analyzed. Aiming at the existing problems, an improved inverter topology was analyzed, which made up the problem. The traditional inverter topology control was complex and it was difficult to control the two motors independently. The simulation model of permanent magnet synchronous motor vector control in MATLAB/Simulink environment was established. The simulation results showed that with the improved inverter topology two motors could be controlled independently and the control was simple.