The content of nutrients which are composed of protein, Amino acid and fatty acid etc of Artemia (including assess the quality of nutrients and brine brine shrimp eggs) is the main criterion to Artemia, because the food value of animal of prey depends on the constituent and content of amino acid and fatty acid.The nutrient of the Artemia in Lagkor Co (Lake) of Tibet is of high value and a succession of samples taken by R & D Centre of Saline Lake and Epi-thermal Deposits (CAGS) were monitored in 1996 and 1997.The protein content of adult brine shrimp is nearly 20%, and that of nauplius and decapsulated brine shrimp eggs about 55% and 50% respectively. The raw fat content of adult brine shrimp is 30% and that of both nauplius and decapsulated brine shrimp eggs is about 15%. The total amount of amino acid of adult brine shrimp is 18% and that of nanplius and decapsulated brine shrimp eggs about 50% and 44% respectively. Among fatty acids the unsaturated fatty acid of adult brine shrimp is up to 83% in samples of 1997 and that of nauplius and decapsulated brine shrimp eggs about 91% and 87% respectively.For three unsaturated fatty acids, the content of HUFA(20 :3, 20 :4, 20 :5) of adult brine shrimp is nearly 8%, and that of both nauplius and decapsulated brine shrimp eggs exceeds 20%.For three necessary fatty acids, the content of EFA (18 :2, 18 :3, 20 :5) of adult brine shrimp is 16% and that of nauplius and decapsulated eggs is 21% and 26% respectively. The contents of EPA (20:5) of both nauplius and decapsulated eggs are above 18%. The content of EPA of Artemia in Lagkor Co is higher than that of Artemia in salt lakes of Xinjiang, Qinghai, Inner Mongonia, Shanxi, Hebei and that of Artemia in salterns of Tianjin and Hainan.The un-satulated fatty acid content of decapsulated brine shrimp egg in Lagkor Co is higher than that in other lakes at home and abroad.