Abstract: The compositions and contents of sugars and amino acids in fruits of Chinese olive from 5different cultivars(strains)were analyzed.The results showed that the contents of total soluble sugar,sucrose and reducing sugar in the fruits of Chinese olive were between 2.43% ~4.47%,1.08% ~2.90% and 1.15% ~1.48%,respectively.All fruits of Chinese olive from 5cultivars(strains)contained 17 kinds of amino acids,including seven human body essential amino acids such as phenylalanine,threonine,lysine and so on(tryptophan not detected),two children essential amino acids(histidine and arginine),two semi-essential amino acids(cystine and tyrosine)and 6 kinds of non-essential amino acids.The total content of amino acids in the fruits of Chinese olive from 5different cultivars(strains)ranged from 688.26 to 1 109.52mg·hg-1.The ratios of essential amino acids,taste amino acids and medicinal amino acids to total amino acids were between 24.13%~25.80%,90.41%~91.47% and 67.98%~ 72.97%,respectively.There was correlation between the contents of soluble sugars and amino acids in fruits of Chinese olive.The content of total soluble sugar was highly significantly positive correlated with the content of sucrose,and significant positive correlated with the contents of sweet amino acids such as serine,alanine and histidine.The content of reducing sugar was significant positive correlated with the content of aspartic acid.