The invention discloses a direct shale gas extraction device, and belongs to the shale gas exploitation technology. Electromagnetic coils and a magnetic field controller are mounted in a protective shell of the direct shale gas extraction device; foot stands are fixedly arranged on one surface under the outer surface of the protective shell; the electromagnetic coils are fixedly arranged under the outer surface of a booster shell; the lower end of the booster shell is fixedly arranged at the lower end in the protective shell; a tubular shaft type gas outlet valve, a sealing ball or a sealing cone, power springs and a magnetism induced piston are mounted in the booster shell; the lower end of the tubular shaft type gas outlet valve passes through from a central hole in one end of the upper surface of the booster shell, and then passes through the power springs and the magnetism induced piston; the sealing ball or the sealing cone is matched with an inner conical surface, so that a channel for introducing the shale gas and a gas outlet channel can be sealed or opened. The direct shale gas extraction device is compact in structure, is small in size, is large in power, is strong in power, is high in efficiency of extracting the shale gas, and is low in electric energy consumption.