The invention aims to provide a press-type sealing cover venting hole sealing structure good in sealing effect, convenient to operate and long in service life. The structure comprises a sealing coverbody. The top surface of the sealing cover body is provided with a mounting cavity. The bottom surface of the mounting cavity is provided with a venting hole penetrating through the sealing cover body. A movable cover plate is further mounted in the mounting cavity. A pair of rotating shaft parts are arranged on the two sides of the movable cover plate. Bearing holes matched with the rotating shaft parts are arranged on the side wall of the mounting cavity. The movable cover plate is divided into a left half part and a right half part by the axis of the rotating shaft parts. The side wall of the mounting cavity is provided with a locking protruding block, and the locking protruding block is arranged at the position corresponding to the end portion of the right half part of the movable cover plate. The bottom surface of the left half part of the movable cover plate is provided with a sealing plug, and the sealing plug is in sealing fit with the venting hole.