Underground water sampling equipment

The utility model relates to underground water sampling equipment which comprises a transverse plate, a motor is fixedly installed at the top of the transverse plate, a vertical cylinder is fixedly installed at the bottom of the transverse plate, a threaded rod is fixedly installed at the output end of the motor, four limiting vertical grooves are formed in the inner wall of the bottom of the vertical cylinder, and a water storage cylinder is fixedly installed at the bottom of the vertical cylinder in a penetrating mode. A piston is slidably mounted in the water storage cylinder, a vertical rod is fixedly mounted at the top of the piston, and four guide blocks are fixedly mounted on the edge of the top of the vertical rod; according to the scheme, the motor is started to drive the threaded rod to rotate, the limiting vertical groove can limit the guide block, the threaded rod is in threaded connection with the vertical rod and can drive the vertical rod to move up and down, when the piston moves downwards, ai