Biochemical engineering is an interdisciplinary discipline composed of many disciplines such as biology, chemistry, engineering, etc. It studies basic theories and engineering techniques in the process of organisms or bioactive substances. It is an important branch of the first-level discipline "Chemical Engineering and Technology" and a key development of the second-level discipline. It plays a key role in the industrialization of biotechnology.

It is the law of the chemical process, plus the characteristics of the biological product know itself, used in bioengineering. Bioreaction engineering, bioseparation engineering, enzyme engineering, pharmaceutical engineering, genetic and protein engineering, environmental microbes, and special control control ... can be counted as the category of biochemical industry. On the one hand is the production process, on the one hand is the downstream technology.