With the gradual application of electromagnetic launch technology to engineering applications, electromagnetic launch equipment has increasingly stringent requirements on the volume and weight of the power supply system, and has increasingly higher requirements on the charging power of the primary power supply. To realize the on-board integration of the primary power supply and the rapid charging of the pulsed capacitor, a high-power high-frequency and high-voltage charging power supply based on parallel inverter is developed in this paper. The charging power supply consists of two high-frequency and high-voltage charging units connected in parallel at the output end. Each unit contains two high-frequency and high-voltage transformers and a high-voltage rectifier circuit. The primary side of each transformer is provided with high-frequency AC voltage by two high-frequency inverters connected in parallel. All inverters are coordinated and controlled by the same main control unit, which can achieve 7 kV high-voltage output and a peak power of up to 750 kW.