Fences are widely used in our production and life, with garden fences, road fences, municipal fences and so on. At present, private villas and courtyard fences are popular in many cities, mostly based on wooden plates. It consists of three parts: a fence board, a cross-belt board and a fence post. The height is generally between 0.5 and 2 meters. Different shapes, generally with decoration and simple protection as the main installation purpose, very popular in Europe and America.