Movable side slope grass trimmer based on guardrail

The utility model discloses a movable side slope grass trimmer based on a guardrail, and solves the problem of low grass trimming working efficiency. The grass trimmer comprises an electric flat car, a diesel generator assembly and a self-walking truss, the electric flat car is located in an emergency lane on the inner side of a guardrail, and the diesel generator assembly is fixed to the electric flat car; the self-walking truss comprises a first walking mechanism, a second walking mechanism, a truss body and a plurality of grass trimmer head modules installed on the truss body, and grass trimmer heads are arranged downwards. The first walking mechanism and the second walking mechanism are located on the slope top and the slope bottom of the two sides of the truss in the length direction respectively, the two walking mechanisms are hinged to the truss through steel pins respectively, and after connection, the truss is parallel to the slope. According to the device, the wave-shaped guardrail is used as a guid