Highway safety protective fence

The utility model discloses a road safety protective fence, which belongs to the technical field of protective fences and comprises a foundation pile, a groove is fixedly connected to one side surface of the foundation pile, a cross rod is arranged in the groove, a sliding groove is formed in the front side surface of the cross rod, a sliding block is arranged in the sliding groove, and a buffer assembly is arranged on one side surface of the sliding block. The front end of the sliding block is fixedly connected with a buffering block, the front side surface of the buffering block is provided with an arc-shaped section, and the rear side surface of the sliding block is provided with a sliding mechanism. The protective guard has the advantages that when an automobile collides with the protective guard, the impact force of the automobile on the protective guard can be reduced, and therefore the injury degree of people in the automobile can be reduced; and through mutual matching of the balls in the mounting hol