Steel plastic grating is made of high-strength steel wire (or other fibers), specially treated with polyethylene PE or polypropylene PP, and added with other additives. It is extruded to form a composite high-strength tensile strip with rough embossing on the surface. From this single strip, it is arranged or sandwiched at a certain distance in the vertical and horizontal directions, and welded at the junction point using special strengthened bonding welding technology (ultrasonic welding technology) to form a reinforced geogrid.