Abstract: Considering power quality of switch power supply for electrolysis electroplating,a high-frequency switch power supply based on simplified PWM rectifier is discussed in this paper.The pre-rectifier is a PWM rectifier with four switches,and the back system has adopted a half-bridge inverter for high frequency transformation,which can effectively reduce the number of switches.For the PWM rectifier,a deadbeat control method is derived based on the switch model,which can realize quickly rectifying.For the multi-parallel problem of switch power supplies,a current-sharing control based on virtual impedance is proposed,which can realize the stable and balance operation of multi-parallel power supplies.Finally,simulation and experiment results verify the correctness of the proposed structure and control method.