The invention provides bleached fish meal and a processing method and application thereof. The bleaching method of fish meal comprises the step of at 80-105 DEG C, performing bleaching treatment on the fish meal through a mixed solution of sulphuric acid and acetic acid. The invention further performs further optimization on the bleaching method. According to the bleaching method disclosed by theinvention, the fish meal is subjected to bleaching treatment through the mixed solution of sulphuric acid and acetic acid at specific temperature, so that the color of the fish meal can be effectivelyremoved, the fish meal turns white from yellowish-brown or yellowish-brown, and other properties of the fish meal are not influenced basically. The bleached fish meal is no longer limited as an animal feed, can be further used for preparing external use medicines or surgery suturing lines in the trade of medical care or feature beautifying, or can have other wide purposes.