Building construction rainfall drainage structure

The utility model relates to the technical field of building drainage, and discloses a building construction rainfall drainage structure which comprises a ground, a water outlet is formed in the ground, a cover plate is arranged at the top of the ground, and an annular water outlet is formed in the middle of the cover plate. Due to the arrangement of the servo motor, the sweeping assembly, the filter plate and the like, when rainwater is drained in a building construction environment, the servo motor drives a threaded sleeve on the surface of a threaded rod to reciprocate; a brush plate at the bottom of a threaded sleeve sweeps garbage filtered on the surface of a filter plate into two symmetrical collection frames through a through groove for collection, and an arc-shaped guide sleeve is arranged to shield the surface of a threaded rod, so that the situation that normal movement of the threaded sleeve is affected due to the fact that garbage is attached to the surface of the threaded rod can be prevented; in