Dam automatic flood control gate

The utility model relates to the technical field of water conservancy projects, in particular to an automatic flood control gate of a dam. According to the specific technical scheme, the dam automaticflood control gate comprises a dam body foundation, a plurality of supporting seats fixed to the dam body foundation at equal intervals and a cross beam fixed to the tops of the supporting seats, a gate body is arranged between every two adjacent supporting seats, and the gate bodies comprise the upper gate body and the lower gate body which are meshed with each other; a lifting mechanism for lifting the upper gate is fixed on the upper gate; a flood discharge opening is formed in the position, close to the center of the bottom of the lower gate, of the lower gate, a movable gate is arrangedin the flood discharge opening, a strip-shaped hole for the movable gate to penetrate through is formed in the bottom of the flood discharge opening, and a driving mechanism is fixed to the bottom ofthe movable gate and arrang