Steel plate is flat and square with a welded steel products, its use is widespread. More than 95% of the steel grid plate products are made of carbon steel. Stainless steel production in special circumstances. Products are very diverse, according to different raw materials can be divided into: type I, the tooth profile and the compound type, according to the function of different uses can be divided into: type of platform, ditch cover plate and a stepping plate several. According to different production methods for pressure welding type, pressure type lock and plug type.