Abstract: Nano-diamond, which not only possesses the ultrahard characters of diamond but also the small size effect of nano-materials, is an important nano-powder material and has wide development space. However, its agglomeration limits the wide application of nano-diamond. To solve this problem, the industry has conducted a lot of research through physical dispersing methods and chemical treatments to disperse the diamonds. Hereby, the progress of research on the dispersion of detonation-synthesized nano-diamond in recent years are summarized, and the main mentality is concluded to provide reference for further development of dispersing nano-diamond.