The invention relates to a soybean meal fermentation process in the technical field of vegetable protein fermentation, which mainly comprises the following steps: raw material clearing, mixed inoculation, fermentation, puffing, drying, cooling, crushing, screening and finished product packaging. The invention is mainly characterized in that materials are fermented in a fermentation cabin so as toensure the temperature and humidity environment for the fermentation of the materials, the materials are provided with air at regular times and are stirred in the fermentation process so as to ensurethe materials to be fermented uniformly, and simultaneously follow-up treatments such as puffing, vacuum drying, cooling and the like are increased in the fermentation process to further prevent nutrient components in the fermented materials from being damaged. In addition, the materials are fermented by a multi-microorganism compound bacterial liquid, the fermentation time can be shortened through the multi-microorganism synergistic effect, the materials fermented by the process disclosed by the invention have uniform quality and high nutritional value, feed absorption rate of animals is increased, and the materials are convenient to store.