Protective fence

The utility model discloses a protective fence, which relates to the field of protective fence construction and comprises an upper protective fence frame and a lower protective fence frame, the upper protective fence frame and the lower protective fence frame are detachably connected through a plurality of supports, and a buffer structure is arranged between the upper protective fence frame and the lower protective fence frame. A rolling structure used for driving the lower guardrail frame and the upper guardrail frame to move is arranged on the bottom end face of the lower guardrail frame. The buffering structure comprises an anti-collision protection barrel, a rotating shaft is rotatably arranged on the anti-collision protection barrel in a penetrating mode, one end of the rotating shaft is detachably connected with the upper guardrail frame through an upper limiting structure, and the other end of the rotating shaft is detachably connected with the lower guardrail frame through a lower limiting structure.