Roof water storage device for sponge city

The utility model discloses a sponge city roof water storage device which comprises four blocking plates, the four blocking plates are fixedly connected with a roof through bolts, waterproof films are bonded to the four blocking plates and the top of the roof through adhesives, sliding grooves are formed in the opposite sides of the left blocking plate and the right blocking plate, and the sliding grooves are communicated with the waterproof films. A toothed plate is fixedly connected to the bottom of an inner cavity of the sliding groove, a push plate is arranged between the left blocking plate and the right blocking plate, a mounting groove is formed in the top of the back face of the push plate, and a double-output-shaft motor is fixedly connected to an inner cavity of the mounting groove. Through the cooperative use of the barrier plate, the waterproof film, the sliding groove, the toothed plate, the push plate, the mounting groove, the double-output-shaft motor, the gear, the groove, the brush plate, the