Abstract: According to actual situation of domestic rice production enterprises，key technology of high humidity and high temperature expansion and preservation of rice bran was put forward.In view of short preservation time of rice bran in summer，method of high humidity and high temperature was used to puff and cold dry rice bran，which inhibited rancidity process of rice bran.At the same time，on premise of saving plant land as much as possible，rice bran production process line was distributed among multiple floors to achieve effect of small rice bran processing area and high product quality.At actual production level，problem of rapid deterioration of rice bran in summer in previous rice bran processing process was solved，which was suitable for promotion and application of process in small and medium-sized rice bran processing enterprises，its economic and social benefits were remarkable.