The invention discloses a drainage valve double-control module. The module includes a housing, a button body, an air pipe, a pneumatic rod and a gasbag, wherein the button body, the air pipe, the pneumatic rod and the gasbag are installed in the housing; the button body is of an internally hollow structure, one end of the button body is exposed outside the housing, the other end is arranged above a reset button of a drainage valve, and the upper portion of the button body is provided with a vent hole; one end of the air pipe is in seal connection with the vent hole, and the other end of the air pipe stretches out of the housing and is connected with the air pump; the pneumatic rod and the gasbag are installed in the button body, the air inlet end of the gasbag is communicated with the vent hole, and the pneumatic rod is arranged between the gasbag and the reset button of the drainage valve. The invention further discloses the application of the control module in a closestool. The structure is compact, the gasbag is inflated through the air pump to achieve automatic drainage, and the air pump releases pressed air to achieve automatic reset; at the same time, the closestool has two control modes, namely the pneumatic control mode and the manual control mode, and the control is flexible and stable.