The invention discloses an orange peel dregs biologic fermentation method, and belongs to the technical field of orange peel dregs innocuous treatment. Orange peel dregs are used as a main raw material and added with a liquid micro organism bacterial agent, and is subjected to composting primary fermentation and composting fermentation, so as to prepare a fermentation product which is rich in organic substances and microelements such as boron, zinc and magnesium, and is proper in the proportions and contents of N, P and K. The content of the organic components of the fermentation product is not less than 45 percent, the pH value is within 6.5-8.5, the total content of N, P and K is not less than 6 percent, the moisture content is not greater than 30 percent, the fermentation product is rich in the microelements such as boron, zinc and magnesium, can be directly used as an organic fertilizer, meanwhile can be added with a microelement fertilizer or a chemical fertilizer to be compounded into an organic compound fertilizer, an organic-inorganic compound fertilizer and the like. The orange peel dregs biologic fermentation method is simple in process, low in cost and high in production efficiency, not only processes a large amount of orange peel dregs, but also prompts the treatment of other organic waste materials, so as to not only protect the environment, but also increase the economic benefits, achieve low-carbon production and explore a new method for the innoxious treatment of the orange peel dregs.