Building drainage filtering device

The utility model belongs to the technical field of building drainage, particularly relates to a house building drainage filtering device, and provides the following scheme aiming at the problem that a conventional house building drainage filtering device is troublesome to clean due to the fact that a filter screen in the conventional house building drainage filtering device is inconvenient to disassemble. The device comprises an upper drainage pipe, a filter screen, a connecting cylinder, a lower drainage pipe and two connecting plates, the bottom end of the upper drainage pipe and the top end of the lower drainage pipe movably abut against the top and the bottom of the filter screen in a sealed mode respectively, the filter screen is arranged in the connecting cylinder, and a first clamping groove and a second clamping groove are formed in the two sides of the upper drainage pipe and the two sides of the lower drainage pipe respectively; first clamping plates and second clamping plates are fixedly mounted o