Foundation pit drainage device

The utility model discloses a foundation pit drainage device, and particularly relates to the technical field of foundation pit drainage, which comprises a working table, a support plate is fixedly arranged on one side of the top of the working table, a winch is fixedly arranged on the other side of the top of the working table, a pull rope is wound on the winch, and a disc body is arranged on one side of the working table. One end of the pull rope is fixedly connected with the top of the disc body, a water pump is fixedly arranged on the surface of the rear side wall of the workbench, and a limiting assembly is fixedly arranged on the top of the supporting plate. The pulling rope is wound through the winch, the disc body is slowly placed in a foundation pit through the pulling rope, then water in the foundation pit is pumped out through the water pump, the filter screen on the disc body filters out silt impurities with large sizes, the motor in the groove drives one rotating shaft to rotate, the two rotating