Process for preparing protein extract from low-value small fish

The method of one kind of low protein extract prepared using a small trash, which material after pretreatment, enzymatic hydrolysis, bitter off, to the residue, degreased, concentrated aroma Maillard reaction, drying refining processes. The present invention uses enzymes and proteins within the protein mild exonuclease digestion, and enzymatically debittering debittered hydrolyzate addition, with the Maillard reaction technology improves the taste of the product, and different functions can be prepared the use of a functional protein product. Products rich small proteins, peptides, carnosine, amino acids, nucleotides, vitamins and trace elements, can be widely used spices, nutraceuticals, functional foods and so on.