The utility model provides an underground gas rapid extraction device, which comprises a gas jet pump body, a rotary suction pipe and a gas flow injection pipe, and the gas jet pump body comprises a diffusion pipe group at the upper part, a rotary suction pipe at the lower part and a gas flow injection pipe; a drainage cavity connected with the diffusion tube group is arranged below the diffusiontube group; the rotary suction pipe and the diffusion pipe group are coaxially arranged on the drainage cavity through a sealing bearing; the airflow injection pipe is arranged on the side wall of thedrainage cavity; the included angle between the airflow jetting direction of the airflow jetting pipe and the axis of the diffusion pipe set is an obtuse angle, the jet airflow is provided with a sailboard in the pressing area of the side wall of the rotary suction pipe, the jet airflow acts on the sailboard to enable the rotary suction pipe to rotate around the axis of the sailboard, and an airsuction hose is arranged at the position, close to the lower end, of the rotary suction pipe. While underground gas is extracted according to the jet flow principle, rotation of the rotary suction pipe is achieved, the air suction hose is driven to swing underground, the air suction range is enlarged, underground air is disturbed, and the gas concentration in a larger-range space is rapidly reduced.