The invention discloses an eco-utilization method for silver carp. The method comprises pretreatment of the silver carp, and is characterized by comprising the following steps: making breaded fish stick and canned luncheon meat from silver carp meat; performing heating enzymolysis on fish heads, fish bones and fish skin of the silver carp and filtering, wherein the filter residues obtained by filtering are used for preparing bone meal; performing membrane concentration on the filtrate, concentrating the volume to be 50% of the total amount of minced fillet, cooling, freezing into ice, adding into the breaded fish stick and canned luncheon meat, and taking the breaded fish stick and canned luncheon meat as an ingredient of protein powder or drink; preparing a fish protein liquid fertilizer by utilizing internal organs of the fish; and preparing collagens by utilizing scales. By virtue of the eco-utilization method disclosed by the invention, the silver carp meat including processing leftovers can be utilized all. The process is a closed-loop circulation process, and emission of any pollutant or waste is avoided in the processing procedure; and moreover, the scope of the invention is not only limited to the silver carp, but also includes carp, grass carp, bighead carp and other freshwater fishes. According to three technical routes of the method disclosed by the invention, the fish meat, fish heads, fish bones and internal organs of the fishes are reasonably utilized to the greatest degree, particularly the concentrated solution prepared from the fish heads and the fish bones is applied to the breaded fish stick and canned luncheon meat, and the cost is naturally saved.