Metallurgical industry refers to the industrial sector that exploits, concentrates, sinters metal ores, smelts them and processes them into metal materials. Compared with other industries, metallurgical industry has great differences, but also has a certain degree of industrial relevance and periodicity. With the continuous development of social economy, there is a strong demand for iron and steel in all walks of life. Normally, the iron and steel metallurgical industry has certain scale economic characteristics in the process of development. However, due to some problems in investment and construction scale of China's metallurgical industry, the performance of scale economic characteristics is not very obvious.