The invention provides a high-yield low-pollution preparation method for minced fish products, which belongs to the technical field of aquatic food processing. A main preparation process of the method comprises the steps of removing offal, heads and tails of silver carps, grass carp and other freshwater fishes and obtaining minced fish products through fish collection, rinsing, seasoning, mincing, molding and heating. Aiming at the problems of severe protein loss, low product yield, high content of soluble protein and high COD in rinsing wastewater, and the like in the conventional water rinsing process, the method adopts a novel control acid-base rinsing method, precipitates protein at isoelectric points, and then further recover the protein in wastewater through ultrafiltration membrane, so that the minced fish products prepared have the characteristics of high protein content, high production yield, low environmental pollution and the like. In addition, compared with the products of the conventional water rinsing method, the products of the invention have no significant difference in color, texture, gel properties, sensory property, flavor, storage stability and other characters.