To select the best sweet cherry cultivar in Weining County,Guizhou Province,the external/internal quality parameters of five sweet cherry cultivars were quantified and comprehensively evaluated.The results showed that 12 indices including fruit weight,content of soluble solid,content of soluble sugar,and ratio of soluble sugar to titratable acid etc,varied highly among five cultivars.There were significant correlations between the fruit weight and the content of soluble solid,content of soluble sugar,or ratio of soluble sugar to titratable acid,or ratio of content of soluble solids to titratable acid; between the content of soluble solid and fruit diameter; between the ratio of content of soluble solids to titratable acid and ratio of content of soluble sugar to titratable acid,or content of soluble sugar.The cumulative contribution of three principal components was 93.55% and all the 12 indices were involved.Based on the comprehensive evaluation model of fruit quality,the first principle component played a key role in fruit quality.The best cultivars were Brooks and Spar kerry,followed by Santina.The least ones were Black pearl and Yanyang.