A cyclone ignition gun includes a housing, an igniter, an electric fan, a battery pack, a gas can and a duct pipe respectively mounted inside the housing, a slide switch mounted in the top side of the housing for controlling the operation of the igniter and the electric fan, and a push switch mounted in the bottom side of the housing for controlling the gas can to discharge gas for burning. The slide switch and the push switch can be simultaneously operated to selectively achieve the function of fire burning and air blowing, the function of fire burning, or the function of air blowing.