The invention relates to the technical field of disc valves, in particular to an automatic wet disc valve. The automatic wet disc valve comprises a disc valve body provided with an inlet and an outlet; the disc valve body includes an electric actuation mechanism, and a hoisting mechanism connected with the electric actuation mechanism; the electric actuation mechanism includes a motor and an electric push rod; an output shaft of the motor is connected with the electric push rod; the hoisting mechanism includes a bracket, a first pulley and a second pulley arranged at the top of the bracket, and a steel wire rope wound on the first pulley and the second pulley; one end of the steel wire rope is connected with the electric push rod, and the other end of the steel wire rope is connected with the top end of a rod body; the bottom end of the rod body is connected with a disc body; and water seal structures are arranged on the rod body of the hoisting mechanism and the upper cover plate of the disc valve body. The automatic wet disc valve is added with the water sealing structures on a traditional wet disc valve structure, so that the wet disc valve can achieve total sealing; and meanwhile, the electric push rod is added as the actuation structure to solve the automation problem.