In order to improve the disadvantage of the fundamental frequency charging power supply which has large volume,large weight and low charging precision,a high frequency and high voltage charging power supply including a full bridge inverter circuit and a series resonant soft switch circuit was developed,and its output voltage is 36 kV and average charging power is 10 kJ/s.Employing three phase 380 VAC as its energy system,high power intelligent power module(IPM)as full bridge inverter circuit,high voltage pulse charging for load capacitor is generated by series resonant circuit and high voltage pulse transformer.The system is controlled by sampling output voltage and output current,chip SG3525 controls duty cycle of driving signal by feedback signal.Experimental results show that output voltage of the charging power supply is 36 kV,output average charging power is 10.8 kJ/s,charging efficiency is 0.82 and ripple coefficient is 1%.The laser works stably in 30 Hz by applying the series resonant charging power supply system.