Sinking tank for water pollution control

The utility model discloses a water pollution control settling pond which comprises a settling pond, a pump body is fixedly arranged on one side of the settling pond, the input end of the pump body extends into the settling pond through a pipeline, a filter screen is arranged in the settling pond in a sliding mode, and a vertical rod is fixedly arranged at the top end of the filter screen. A supporting plate is fixedly arranged at the top end of the vertical rod, hydraulic rods are fixedly arranged on the two sides of the sedimentation tank, and a stirring mechanism facilitating sludge stirring is arranged at the top end of the supporting plate. After the sedimentation of the sedimentation tank is completed, the hydraulic rod is started to drive the supporting plate to move upwards, so that the filter screen is driven to move upwards through the vertical rod, the filter screen is lifted, sewage is filtered by the filter paper at the bottom end, sludge remains at the top end of the filter screen, and the filte