Abstract: This experiment was conducted to investigate the effects of the lutein on bovine milk physical and chemistry index of diet.Sixty Holstein cows were randomly divided into five treatment groups: The control group, the treatment group Ⅰ,the treatment group Ⅱ, the treatment group Ⅲ and the treatment group Ⅳ.The treatment group cows were fed daily lutein 50 g (A experiment material), 100 g (A experiment material), 100 g (B experiment material), 150 g (A experiment material). The lutein, milk fat, milk protein, lactose, dry matter content and milk yield changes in milk were measured in which 0, 10, 20, 30, 40 and 50 d. The results showed that the sample A was better than sample B of lutein the diet.Adding 150 g sample A to every cow and every day could significantly improve the content of lutein in milk.Recommended dietary lutein content in the production of the 150 g/d was appropriate.

Key words: lutein; raw milk; cow; milk composition