Safety fence

The utility model discloses a safety fence, which includes a horizontal scaffold, vertical scaffolds, a main scaffold, fence boards, lateral net fixing racks, lateral safety nets and nylon net ropes, wherein the horizontal scaffold arranged at one end of the wall body is mounted on the wall body, and is fixed through the vertical scaffolds on the two sides in the vertical direction; the main scaffold is arranged on the horizontal plane where the fence board and the nylon net rope are mounted; the horizontal scaffold, the vertical scaffolds and the main scaffold are in buckled connection; the lateral safety nets are mounted on the vertical scaffolds on the outer sides; the two lateral net fixing racks are arranged on the two diagonals of the vertical scaffolds on the outer sides; the fence boards and the nylon net ropes are mounted on the main scaffold in a manner that each fence board is mounted at the lower part of the corresponding nylon net rope. The safety fence adopting triple protection of the fence boa