Key components of Antarctic Krill meals were analyzed such as protein, lipids, minerals and chitin content. Composition and content of amino acids, fatty acids and mineral element were also researched using nutritional assessment strategies in this paper. Finally, the protein processing base material was prepared by two steps include sieving and defatting. The results showed that the content of protein was 61.38%, lipids was 14.49%, chitin was 6.08% and mineral element was 6.27%. Protein of Antarctic Krill meals was a high quality protein referenced by FAO/WHO based on the total amino acid content of 47.34%, essential amino acid content of 38.74% and essential amino acids to non-essential amino acids ratio of 70.24%. Moreover, the functional amino acids content were also abundant. Lipids of Antarctic krill meal was found exploitable by polyunsaturated fatty acids content of 61.98%, polyunsaturated fatty acids content of 25.10% and EPA+DPA+DHA content of 18.19%. The functional minerals (K, Na, Mg, Ca, P, Fe, Cu, Zn, Sn) were found rich content and balanced composition in Antarctic krill, and the levels of heavy metal pollution (Cr, As, Cd) were extremely low simultaneously. The content of protein-peptides in processing base material is 70.91% by 30 mesh screening and degreasing with n-hexane-ethanol (9∶1), Which reached the quality standards of Antarctic krill meals, exceeded the evaluation criteria of special grade fishmeal and reduced 10% fluorine content of the system. The above results provided basic information and theoretical reference for protein production and byproducts utilization of Antarctic Krill meals.