Abstract: The article discussed the advantages and disadvantages of using morphological markers, cytological markers, biochemical markers and molecular markers in the identification of crop cultivars, focusing on the application of moleuclar marker fingerprint in identifying crop cultivars. In addition to the discussion of the application of protein eletrophoresis fingerprint, which is produced by the elect rophoresis of isozyme and depot protein (prolamin, albumin, glutelin, globulin, etc.), recent DNA fingerprint techniques of RFLP, RAPD, minisatelite DNA, microsatellite DNA, ISSR, AFLP, CAPS and SNPS, and their contribution to the identification of crop cultivars, new cultivars registration, the inspection of cultivar purity, the relationship among cultivars and the studies in classification are thoroughly discussed as well.