Bridge protective fence

The utility model discloses a bridge protective fence which comprises a protective fence body, a telescopic rod is connected into the protective fence body in a sliding mode, a supporting column is installed on the top of the protective fence body, an anti-collision cylinder is rotationally connected to the outer surface of the supporting column, a rotating disc is rotationally connected to the bottom of the protective fence body, and a wheel frame is installed at the bottom of the rotating disc. Axles are rotationally connected to the bottoms of the wheel frames, and wheels are rotationally connected to the outer surfaces of the axles. According to the anti-collision guardrail, the anti-collision barrel is installed at the top of the guardrail, when an automobile collides with the guardrail, the anti-collision barrel rotates, the moving direction of the anti-collision barrel is changed, the wheels are installed at the bottom of the guardrail, under the condition of bridge construction, the guardrail can be m