In this paper, we analyzed the trend of ripple effects of the Chinese steel industry for 20 years from the 21st century to the present. In particular, in 2002, 2007, and 2012, industrial classification standards were used as medium classification criteria (42 items), but the input output table in China in 2017 used the industry classification criteria as sub-classification criteria (149 items). It can be seen that there is a difference in the fact that detailed analysis was conducted. When looking at the related industries of the steel industry from 2002 to 2017, if there was a relationship mainly to traditional manufacturing industries such as communication equipment and other electronic equipment manufacturing, medical device manufacturing, electrical/mechanical and equipment manufacturing industries in the early 2000s. It can be seen that, after the steel industry gradually changed its policy from quantitative to qualitative, a relationship was gradually formed with the specialized manufacturing industries, which added technology to the traditional manufacturing industries such as specialized equipment manufacturing, other manufacturing, and measuring/instrument manufacturing. However, as a limitation of this study, the point of analysis that is always discussed is different from the present point. Because the publication of the input and output tables in China takes place on average 2-3 years later, it can be seen that there are difficulties in analyzing the current industrial relations. However, in order to supplement this, research provides important implications from a single point of view, if follow-up research is conducted continuously for a long time, the existing development trend can be seen. It is expected that more abundant research results that can infer the direction will be drawn.