A method for treating citrus peel by processing pieces of raw citrus peel through a plurality of progressive, continuous clean steaming and mechanical pressing stages； rupturing at least some of the cells of the pieces of raw citrus peel to release liquid, sugar and oil bound within the pieces of raw citrus peel； and transforming the pieces of raw citrus peel into press cake and pressate. The clean steaming step ay involve using clean steam that is free of chemical water treatment additives.
