Abstract:Inthisstudy，thebasicnutritionalcomponents，aminoacids，mineralsandheavymetalsofFanjingshan dark tea were determined and its nutritional value was evaluated.The results showed that the protein，ash，crude fiber，total sugar，reducing sugar and vitamin C of Fanjingshan dark tea were 11.17，4.18，18.91，7.59，2.96 g/100 g and 40.49 mg/100 g，respectively.There were 17 kinds of amino acids in Fanjingshan dark tea，the total amount of amino acids was 14.875 g/100 g，the ratio of essential amino acids to total amino acids（EAA/TAA）was 48.50%，the ratio of essential amino acids to nonessential amino acids（EAA/NEAA）was 94.19%，which conformed to the ideal mode of Food and Agriculture Organization of the United Nations/World Health Organization（FAO/WHO）.There were 9 kinds of effective amino acids in Fanjingshan dark tea，accounted for 64.34%.According to the amino acid score （AAS）and chemical score （CS），the first limiting amino acid of Fanjingshan dark tea was methionine and cysteine，and the index of essential amino acid was 105.114；the total amount of free amino acid was 0.561 g/100 g，and the arginine content was the highest，which was 0.381 g/100 g；the mineral elements of Fanjingshan dark tea were rich，in which the content of trace element selenium was up to 4.61 mg/kg；mercury，lead，cadmium and arsenic were all consistent meet the national health limit standard.In conclusion，Fanjingshan dark tea was rich in nutrients and amino acids.It was a high-quality protein source and selenium rich tea resource.