Abstract: In this experiment, roxburgh rose residue which after roxburgh rose juicing was taken as raw material, and we studied the extraction process of dietary fiber from roxburgh rose pomace by a mixture of Lactobacillus bulgaricus and Streptococcus thermophilus(1:1)as the fermentation starter, the technology of extracting soluble dietary fiber(SDF)was studied by microbe fermentation. The effects of inoculating volume, fermentation temperature and fermentation time, pH and solid-liquid ratio on the SDF yield were explored by single factor experiments. And then orthogonal experiment was designed to study the optimal techniques on extracting of dietary fiber from roxburgh rose pomace. The results showed that the optimal condition of extracting SDF was as follows:inoculating volume 12%, fermentation time 48 hours, fermentation temperature 40℃, pH6.0 and solid-liquid ratio 1:25. Under these conditions, the average SDF yield of fermentation method which reached 16.81% under the optimal condition, and the ratio of soluble dietary fiber were increased, and the SDF obtained by fermentation had higher water-holding capacity and swelling capacity than roxburgh rose pomace.