Steel structure material is high quality carbon steel which is accordance with national standard. Steel parts and fasteners are processed according to “GB/T1912-2002 Technical Requirements and Test Methods of Hot-galvanized Layer for Metal Coating Steel Production”. Inside and outside hot galvanized steel should meet the national standard (GB/T3091-93) requirements of quality products. Galvanized layer should have thickness uniformity, no burr, and the galvanized layer thickness is not less than 60um. It is factory production, and on-site assembly. The main structure column is welded on the foundation prefabricated iron parts; in addition to a small number of fittings, other accessories connection of greenhouse structure are installed directly by screws or Self-drilling and tapping screws.