Fit for producing rigid flat net , treat HDPE, LDPE and PP as raw materials, new molecule materials, such as anti-static agent and aging resistant agent are added, net products that have various forms and specs can be extruded with certain tensile intensity, wearable performance, chemical stability, weatherable performance and corrosion resistance. Plastic flat net with various specs can be produced for construction, gardening project, agricultural breeding, lining of soft mattess, packing net, water and soil preservation if relevant matrix and sizing jacket are collocated.