The status of research and major achievements in the research of micropowder formation with supercritical fluids were reviewed.Some new methods and processes developed recently were introduced including methods of rapid expansion of supercritical solutions(RESS),supercritical anti solvent(SAS),super critical retrograde crystallization(SRC), supercritical drying(SD),and chemical synthesis of supercritical fluids,etc.The principles,features feasibility,applicatio...