Abstract：In order to improve the utilization efficiency of potato onion germplasm resources，this paper conducted comprehensively evaluation on the agronomy and quality traits of 69 accessions potato onion germplasm resources by methods of variation analysis，correlation analysis，principal component analysis and clustering analysis．The results showed that the variation coefficient range of 69 accessions potato onion was 6.42%-57.04%．The coefficient variation of single ball quality was the largest among them．Leaf number，plant height，crown length，crown width，single ball quality and single plant yield showed extreme significant positive correlation，while showed a extreme significant negative correlation with spherical index．The total flavonoids content was negatively correlated with plant height，crown length，single ball quality，and single plant yield．Eleven agronomic and quality traits were transformed into 4 principal components by principal component analysis with the cumulative contribution rate of 79.849%．Comprehensive evaluation was conducted by using principal component values．The top 5 germplasm were M41，M31，M37，M30，and M33．The systematic clustering divided the 69 accessions materials into 4 groups，group Ⅲ and Ⅳ were characterized with high yield，strong growth vigor and better nutritional quality，respectively．
