he movable blocking door, of the ground; the hidden pools are formed in the ground; a channel is connected between each hidden pool and the hidden drainage passage; the transmission modules are used for achieving the ascending and descending of the movable blocking door; and the hydroelectric power generation modules convert kinetic energy of water to electric energy and control work of the transmission modules. Automatic opening and closing of the movable blocking door can be automatically realized, and energy sources are saved with the adoption of inflating pumps.