Oligosaccharides as dietary fiber increase the growth of probiotics in intestinal tracts and can be a low calorie sweetener. Synbio-Oligo including a rich of fructooligosaccharides (FOS) are produced by a unique production process to solve the phenomenon of pseudo agglutination. This product is beneficial to excellent solubility, fluidity, low hygroscopicity and easy for filling and packaging process, which is suitable for capsule and powder application.