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.