Building sewage treatment device convenient for pipeline collection

The building sewage treatment device comprises bolts, one side of a box body is connected with a water inlet pipe, one side of the water inlet pipe is connected with a connecting pipe, the side, away from the box body, of the water inlet pipe is connected with a rubber pad, and the surfaces of the water inlet pipe and the rubber pad are sleeved with threaded sleeves. The side, close to the water inlet pipe, of the threaded sleeve is connected with a limiting block, the side, close to the threaded sleeve, of the connecting pipe is sleeved with a connecting pipe, and the threaded sleeve is in threaded connection with the threaded pipe. According to the building sewage treatment device facilitating pipeline collection, after a connecting pipe is wound around the surface of a winding column, the connecting pipe at the other end is transversely placed in a groove, a bolt can move downwards while rotating in a threaded hole, and the bolt moves downwards to drive an extrusion block to move downwards through a bearin