In this study, two nutrition indexes and six agronomic characters including crude protein content (CP), relative feed value (RFV), plant height, tillering branches, fresh yields, hay yields, stem/leaf ratio and plant density of 12 alfalfa varieties grown in the irrigated area of Hexi Corridor were evaluated by the grey correlation analysis model. The results showed that The G, Xingjiang Daye and The I were the top three on the yield-index value system; Xingjiang Daye, The I, The H and The G were the top four on the nutritive-index value system; The G, Xingjiang Daye, The I were the top three on the general performance value system. In general，The G, Xingjiang Daye and The I preformed well in the study area, which indicated that these three varieties are suitable for cultivation in the irrigated area of Hexi Corridor.