Remotely and manually controlled three-way gas plugging device for coal mine

The invention discloses a remotely and manually controlled three-way gas plugging device for a coal mine. The three-way gas plugging device comprises an extraction pipe, a plugging plate reversing control device and a three-way gas plugging device body, wherein the plugging plate reversing control device and the three-way gas plugging device body are arranged at the two ends of the extraction pipe; and a plugging plate is hinged to the inner wall of a working cavity of the three-way gas plugging device body, and is connected with the plugging plate reversing control device through a rope. Theplugging direction of the plugging plate is controlled to be switched from the direction of a branch pipe to the direction of a main pipe by dragging the rope through the plugging plate reversing control device, then opening of the branch pipe of the three-way gas plugging device body and plugging of a main pipe air inlet pipe on one side of goaf can be realized, gas extraction in the goaf is blocked, and gas extraction e