At present, the main domestic metallurgical and mining equipment manufacturers are all state-owned enterprises. After years of development, seven traditional heavy machinery manufacturing enterprises have been formed: Dalian Heavy Industry, Northern Heavy Industry, China First Heavy Industry, China Second Heavy Machinery, Taiyuan Heavy Machinery, Shanghai Heavy Machinery, and CITIC Heavy Industries. The so-called "Seven Heavy Machines". In my country's heavy machinery industry, the products of different companies have their own focus, and there is little competition among them. However, in recent years, this competitive landscape has changed, and the products of various enterprises have begun to penetrate each other, and the degree of competition has tended to strengthen. In addition, international companies such as Metso Mining Machinery, Smith Co., Germany SMS and other international companies still occupy a large share of my country's heavy machinery market, especially the high-end market.