Water conservancy double-layer gate

The utility model discloses a water conservancy double-layer gate in the technical field of water conservancy double-layer gates. A permeable gate matched with the sinking groove is embedded in the main drainage channel; a closed gate is movably assembled on the front side of the top end of the permeable gate; a lead screw is in threaded connection with the center of an inner cavity of the closedgate. An auxiliary drainage channel is formed in the right side of the main drainage channel; a water storage tank is formed in the right side of the auxiliary drainage channel; an adjusting gate is arranged at the bottom in the auxiliary drainage channel in a nested manner; a caisson is arranged at the bottom in the water storage tank in a nesting manner; a guide wheel is fixedly arranged betweenthe auxiliary drainage channel and the water storage tank; the adjusting gate and the caisson are fixedly connected through a steel wire rope bypassing the guide wheels, the water guide amount can beadjusted by adjusting the