Highway bridge construction foundation pit protection device

The utility model relates to the technical field of foundation pit protection. The utility model further discloses a highway bridge construction foundation pit protection device. The device comprisesa supporting column of a hollow structure, a rotating shaft is rotatably connected to the interior of the supporting column, protective cloth is wound around the outer surface of the rotating shaft, an inlet and outlet is formed in the outer surface of the supporting column, and the side, away from the rotating shaft, of the protective cloth penetrates through the inlet and outlet to be fixedly provided with a connecting block; protective cloth is wound on the rotating shaft in the supporting column; meanwhile, a connecting block is fixed at one end of the protective cloth; a fixed block is fixed on the outer surface of the supporting column; a connecting groove is formed in one side of the fixed block; when the foundation pit protection device is used, the multiple supporting columns canbe fixed to the ground, th