Building construction rainfall drainage structure

The utility model discloses a building construction rainfall drainage structure which comprises a concrete layer, a box body, a filter box, a stirring box, a storage box, a first baffle, a second baffle, a filter mechanism and a stirring mechanism, and the filter mechanism comprises a first supporting frame, a second supporting frame, a filter screen, a first filter layer and a second filter layer. A first connecting frame and a second connecting frame are fixedly connected to the surface of the inner wall of the filter box, a first supporting frame is slidably connected to the surface of the outer wall of the top end of the first connecting frame, a filter screen is fixedly connected to the surface of the outer wall of the first supporting frame, and a second supporting frame is fixedly connected to the surface of the outer wall of the second connecting frame through bolts. Rainwater in building construction is collected and guided into the filter box arranged in the box body through the liquid inlet pipe, l