Chitosan is a kind of polyglucosamine,which widespread in nature. Studies have shown that chitosan has biological functions such as bacteriostasis,anti-inflammation,anti-oxidation,anti-tumor and immunological enhancement. This article reviewed the effects of chitosan into a diet on fat digestion,fat deposition,serum biochemical parameters and fat metabolism enzyme activity and its gene expression in poultry,and discussed the chitosan regulation of poultry lipid metabolism and its mechanism.