As an efficient, compact and light heat exchanger, aluminum plate-fin heat exchanger is the core part of the normal operation of the main equipment, which is related to the working efficiency of the main equipment. Its application history from the last century 40 years, its quality and life straight generation began to appear, China is from the 1960s began to develop. Aluminum plate-fin heat exchanger belongs to the category of pressure vessel, which requires high vacuum brazing technology. In recent years, the design theory, experimental research and manufacturing technology of plate-fin heat exchanger are studied