Abstract: IGBT full-bridge inverter circuit was used as the main circuit topology of the intrinsic and amplifier stage xenon lamp drive power supplies in the Nd glass laser. Double-loop negative feedback control circuits,which include current control in inner loop and voltage control in outer loop,were used in xenon lamp drive power supplies to achieve the constant current charging to the energy storage capacitor at the limited voltage. High-voltage pulse trigger circuit can produce peak voltage of 30 kV and make xenon lamp cut down reliably,which is composed of the gas-discharge tubes and high-voltage pulse transformer. Pulsed xenon lamp discharge trigger circuit is proposed to gain a very high peak power in pulse laser output by adjusting Q mode. This laser shock processing power supply was applied to TC4 titanium alloy tungsten inert gas (TIG) welding joints,and the effect is significant.