Existing at present in China cold bending steel main varieties are: rectangular tube structure with cold bending, passenger car with cold bending steel, steel, steel window and door screens with low pressure fluid conveying use welded pipe, the general opening cold bend steel, construction steel structure, cold bending steel, as well as a variety of cross section of the cold bending profiles, has been in building, machinery, nuclear power, automobile, railways, agricultural machinery, chemical, oil, refrigeration, food, textile, medical, supermarkets, such as container are widely used in industry and civilian industry, especially the emerging industry of cold bending steel demand trend "wide surface large amount". At present, there are very little cold-formed steel of stainless steel, galvanized sheet, high strength and super-high low alloy steel materials produced in China, which need to be imported. Cold bending steel products with advanced development direction and complex sections, ultra-thick, ultra-thin, series of cold bending steel, the potential market is quite large, broad prospects for development. Now this kind of cold-formed steel is very few in China, many products are still blank, some can only rely on imports to make up.