Water stop device for layered water pumping of hydrogeological drilling

The utility model discloses a waterstop for hydrogeological drilling layered water pumping, which comprises an inner cylinder and an outer cylinder, the inner cylinder is movably connected inside the outer cylinder, the top end of the inner cylinder is provided with a connecting port, and the bottom end of the connecting port is fixedly connected with a water delivery pipe. According to the water stop device for hydrogeological drilling layered water pumping, by arranging a first water inlet hole, a second water inlet hole, a positioning ring, positioning blocks and a positioning sliding groove, when diving water needs to be pumped, an inner barrel in an outer barrel is rotated to drive the positioning blocks on the two sides to move in the positioning sliding groove; when the positioning block moves to one end in the positioning sliding groove and is attached to one end of the positioning sliding groove, the first water inlet holes in the two ends of the inner cylinder can move to one side of the second wate