It is a by-product in the production of gelatin and bone glue, yellow tolight yellow powder, insoluble in water and rich in protein, phosphorus, calcium and other elements. According to the use of the product, it can bedivided into feed bone meal and fertilizer bone meal. As a supplementary feed for animals, it is mainly used for feed additives for livestock and poultry, which can make their bones developed, weight gain, and enhancer esistance to disease. As a fertilizer, bone meal can provide nutrients necessary for crop growth and can also play a role in soil improvement. It is akind of long-term nitrogen and phosphorus mixed fertilizer.

Gelatin is rich in 20 kinds of aminoacids required by the human body,with various characteristics that are incomparable to other food additives,such as gelation, water holding capacity, foaming property, emulsifying property, stability, used.