Abstract: Nutritional composition in visceral mass of wild Hemifusus tuba was determined and evaluated. Each of the snails was high-protein and low-fat, and the pattern of essential amino acids was approximately similar to the ideal pattern of FAO/WHO. The content of protein in the viscera was 80.777%, containing 17 kinds of amino acids including 4 kinds of flavour amino acids. The content of amino acids accounted 51.42% of the dry weight. The total point of methionine and cysteine, the essential amino acids, was up to 85.94. There was plenty of flavour amino acids, which accounted 48.62% of the gross amnio acids, and the EAA/TAA was 40.57%, the EAA/NTAA was 68.72%. All kinds of fatty acids could be detected from the crude fats, and there has high level of unsaturated fatty acid in the total fatty acid. The results indicated that H.tuba is characterized by high nutrition and sanitarian compound.