Abstract: Chemical compositions and amino acids, fatty acids, mineral elements, fluorine in dried Antarctic krill head and shell were compared in this study.Results showed that the crude protein contents of the shrimp head and shell were 57.61%, 46.98%, ash contents were 12.48%, 14.26%, crude fat contents were 5.16%, 5.09%, respectively.Head and shell were detected 18 kinds of amino acid, total amino acids were 43.07% and 47.03%, respectively, in which the content of 8 kinds of essential amino acid to the human body were 18.98% and 20.39%, and accounted for 43.18%, 42.41% of the total amino acids.Besides, there were more flavor amino acids in head and shell, and contents accounted for 36.12% and 35.53% of the total amino acids.Except that, essential fatty acids in the head and shell were rich, more content in oleic acid, linoleic acid, EPA and DHA, and the unsaturated fatty acid content was high accounted for 50.31% and 51.72% of total fatty acids.Head and shell contained a variety of mineral elements, including calcium, potassium, sodium, magnesium and four kinds of major elements, meanwhile containing iron, copper, zinc, manganese, selenium, essential trace element.Fluorine contents in head and shell were 1430mg/kg and 1930mg/kg, respectively.