Abstract:In order to explore the low glycemic properties of quinoa powder prepared with quinoa flour as base material and a certain proportion of oat bran，correlation analysis was conducted on the solubleness and dietary fiber content of quinoa powder with different amounts of oat bran. The results showed that the contents of total dietary fiber（TDF）and soluble dietary fiber（SDF）in the quinoa powder were significantly correlated with the solubleness stability，water solubility index，and water absorption index of the quinoa powder.A high amount of oat bran indicated better solubleness of quinoa powder. In vitro digestion test，starch hydrolysis index（HI），and estimate glycemic index（eGI）were used as assessment indexes，and it was concluded that a higher amount of oat bran was accompanied by lower HI and eGI. The eGI of quinoa powder prepared with the mass ratio of quinoa flour to oat bran of 7∶3 was 54.53，and the human glycemic index（GI）was 47.79.The results of both tests showed that the products prepared according to the mass ratio were low-glycemic foods.