Foundation pit dewatering and water stopping device

The utility model relates to the field of dewatering and water stopping construction equipment, in particular to a foundation pit dewatering and water stopping device, which is characterized by comprising a water tank, a centrifugal pump, a water supply main pipe, a well point pipe, a deslagging device, a water return main pipe and a pneumatic pump which are sequentially connected in series to form a loop. The well point pipe comprises an outer pipe, an inner pipe, a geotechnical cloth filter, a coarse filter and a conical head. By arranging well points and combining the pneumatic pump, the centrifugal pump and the jet flow spraying nozzle, the water stopping effect is good, and the water pumping efficiency is greatly improved; according to the well point pipe, the outer pipe, the inner pipe and the jet nozzle are concentrically arranged, a submersible pump is not needed, the pipe diameter of the well point pipe is small, the well point excavation caliber is small, high-speed jet flow formed by the jet nozzle