Building construction rainfall drainage structure

The utility model discloses a building construction rainfall drainage structure, and relates to the technical field of drainage structures, in particular to a building construction rainfall drainage structure which comprises a box body, a motor box is fixedly connected to the inner front wall of the box body, and a first servo motor is arranged in the motor box. The output end of the first servo motor is fixedly connected with a supporting rod, the outer surface of the supporting rod is fixedly connected with a disc, and the outer surface of the disc is rotationally connected with a swing rod through a shaft rod. According to the rainfall drainage structure for building construction, through the arrangement of the supporting rod, the disc, the swing rod, the impact ball, the supporting spring and the screen, the rainfall drainage structure for building construction has the effect of preventing the drainage opening from being blocked, in the using process, foreign matter is blocked through the screen, the impa