The instantaneous power consumption of 100kW laser weapon is about 500–700kW. At present, airborne power supply is difficult to meet the demand directly. In order to satisfy the requirement of instantaneous high energy output of airborne laser weapon, high energy storage is required between the airborne generator and the laser weapon input stage. According to the laser weapon with output power of 100 kW, the power supply idea of laser weapon is analyzed. The idea of combining power supply of airborne generator, energy storage device and laser excitation source is put forward by the comparison of power supply mode and energy storage device. The research on the power supply technology of airborne laser weapon is carried out by using the super capacitor group as an energy storage device, and the feasibility of the airborne super capacitor energy storage power supply is verified.