Water stop device for hydraulic engineering construction

The utility model discloses a water stop device for hydraulic engineering construction, which relates to the technical field of hydraulic engineering construction and comprises two support plates, the tops of the two support plates are fixedly provided with a same top plate, the bottom of the top plate is fixedly provided with two hydraulic cylinders, the bottoms of the two hydraulic cylinders are fixedly provided with a same upper plate, and the upper plate is fixedly provided with a lower plate. And a first water stop plate is fixedly mounted on one side wall of the upper plate. By arranging the auxiliary water stop mechanism, water flow blocking can be completed through the second water stop plate and the first water stop plate in sequence, double water stop is achieved, in the downward movement process of the first water stop plate, the second water stop plate can be pressed, the water stop effect is guaranteed, meanwhile, an elastic layer on the L-shaped water stop rod can be extruded to deform, and the