A drainage valve structure belongs to the technical field of water conservancy equipment, and comprises a drainage wall. a pneumatic piece is arranged on the upper part of the drainage wall, a drivingrod is connected to the pneumatic piece, a first driven rod is arranged at the lower end of the driving rod, the middle part of the first driven rod is arranged on the inner wall of the drainage wallthrough a fixing seat, a second driven rod is arranged at the other end of the first driven rod, a driving push rod is connected to the second driven rod, three notches are formed in the inner wall of the drainage wall, a first sealing part, a second sealing part and a third sealing part are arranged in the notches, driven push rods are arranged on the first sealing part, the second sealing partand the third sealing part, and the driven push rods are hinged to the driving push rod. The drainage valve structure is novel in structure and clear in working principle, compared with a traditionalgate structure, manual operation is not needed in the operation process, time and labor are saved in the operation process, the response speed of the gate is increased, and the gate opening and closing stability performance is further improved.