In order to solve the problems of midpoint voltage fluctuation, the complicated control problem of the traditional three level VIENNA rectifier, the DC-link midpoint voltage error was introduced to the dual closed-loop control and the DC-link midpoint voltage balance control was achieved by adapting vector action time. Based on the platform of MATLAB/Simulink VIENNA rectifier vector control simulation was built. The simulation results proved that the control strategy was simple and feasible, and it had good dynamic performance and static performance.