Abstract: Special power supply is one of the most active branch of power supply research. Compared with universal power supplies which have vast market, the development of special power supply technology depends on the requirement of physics, chemical, material science and engineering, environment protection, biomedicine, high-technology equipment, space technology and so on. Lately, promoting by the requirement of the national science project and high-technology equipment, the research of special power supplies progress markedly based on the comprehensive application of the new techniques of electrotechnics, material science, computer and so on. The foundation and market scale increase fast. This paper summarizes the development of the special power supplies briefly, based on the data provided by Institute of Fluid Physics, CAEP.