Abstract:In order to evaluate the nutritional value of Tuber indicum from different areas in China，fresh Tuber indicum from Kunming and Baoshan，Yunnan Province，as well as Dalian，Liaoning Province were used as samples. The contents of general nutritional components，amino acids，fatty acids，and mineral elements were detected and analyzed according to relevant national food safety standards，while the contents of five heavy metals and more than 200 pesticide residues were tested and evaluated for safety.The results showed that in terms of general nutritional components，the fat content of Tuber indicum from Kunming was higher，and the dietary fiber content of Tuber indicum from Baoshan was higher；the ash，protein，and crude polysaccharide contents of Tuber indicum from Dalian were higher than those from Kunming and Baoshan. 16 kinds of amino acids were detected in Tuber indicum from the three areas. In the composition of fatty acids，unsaturated fatty acids were significantly higher than saturated fatty acids.The mineral elements were rich.Major elements with higher contents were potassium，phosphorus，and calcium，and trace elements with higher contents were copper，iron，and zinc.The nutritional components of Tuber indicum from different areas were significantly different.Overall，the nutritional components of Tuber indicum from Dalian were higher than those from Yunnan.