Water stop device for hydrogeological drilling and water pumping

The utility model relates to the technical field of hydrogeological detection, and provides a water stopper for hydrogeological drilling and water pumping, which comprises a water pumping pipe (1) communicated with a connecting pipe (2), and a fixed disc (3) inserted with an inserting rod (4) is fixedly connected to the outer wall of the water pumping pipe (1); a first water blocking piece (5) provided with a plurality of first water passing holes (51) is fixedly connected to the inner wall of the water pumping pipe (1), a first limiting groove (11) is formed in the inner wall, located above the first water blocking piece (5), of the water pumping pipe (1), a second water blocking piece (6) provided with a plurality of second water passing holes (61) is movably connected to the inner wall, located above the first water blocking piece (5), of the water pumping pipe (1), a connecting rod (7) rotationally connected with the water pumping pipe (1) is fixedly connected to the second water blocking piece (6), and t