Abstract:In this study，45 main germplasm resources of Chinese yam in 6 cities of Fujian province were collected comprehensively，and 9 quality indexes of tubers were determined. The nutritional quality，processing quality and overall quality of the yam were evaluated by membership function method，principal component analysis and cluster analysis.The results showed that among the measured 9 indexes，the variation coefficients of starch content and edible rate were less than 8%，the variation coefficients of the other seven indexes were more than 20%，in which the variation coefficient of tuber fresh weight was as high as 59.90%. Seven indexes including soluble sugar content，starch content，soluble protein content，allantoin content，drying rate，edible rate and tuber fresh weight were selected to construct a comprehensive quality evaluation system combining nutritional quality and processing quality. The germplasm resources of Fujian yam were classified into four groups by cluster analysis.Category I had general nutritional and processing qualities；Category II was suitable for processing；Category III was suitable for fresh consumption；Category IV had advantages in both fresh consumption and processing.