Scaffold anti-falling device

The utility model provides a scaffold anti-falling device which comprises a wall-attached support, an anti-falling block, a shifting block, a first limiting plate, a second limiting plate, a first elastic piece and a second elastic piece, and a main connecting shaft extending in the transverse direction of the wall-attached support is arranged on the wall-attached support; the anti-falling block and the shifting block are rotatably mounted on the main connecting shaft; the head end of the anti-falling block is provided with a blocking part, and the head end of the shifting block is provided with a shifting part; the upper end of the anti-falling block abuts against the first limiting plate. The first elastic piece is arranged between the anti-falling block and the shifting block, and the shifting part compresses the first elastic piece when rotating in the direction close to the blocking part; the second elastic piece is arranged between the lower end of the anti-falling block and the first limiting plate, an