The invention discloses a comprehensive utilization method of canna edulis ker leaves, and belongs to the bioengineering technical field. Canna edulis ker is used as a raw material, various enzymes are used for treatment, and the comprehensive utilization of plants is achieved. By the means of combining enzymatic transformation with a chemical method, natural products, food and drug additives andother products with antioxidant property are obtained, and good economic value and application prospects are achieved.