Abstract: In order to strengthen the selection of breeding traits for mung beans, three mung bean varieties were soaked with three concentrations of imidazole, using Lüfeng 2, Lüfeng 5, and JLPX02 as experimental materials. Field experiments were conducted to determine 14 agronomic traits, and variance analysis, correlation analysis, and principal component analysis were used to comprehensively evaluate the traits. The stability of the performance of agronomic traits in mung beans under imidazole treatment and the interrelationships between various agronomic traits were studied. The results showed that the six traits of branching, root weight, number of rhizobia, number of pods, single plant fresh weight, and single plant grain weight all showed significant variation and weak stability in the three varieties（lines）; The coefficient of variation（CV） of five agronomic traits, including node number, plant height, pod length, number of seeds per pod, and hundred grain weight, was relatively small and stable; There was a highly significant correlation between 100-seed weight and pod length, with a maximum correlation coefficient of 0.906; There was a significant correlation between yield and branching, number of grains per pod, and grain weight per plant. In principal component analysis, 100-seed weight, pod length and pod number were the main indexes reflecting pod factors in the first principal component; In the second principal component, fresh weight per plant, grain weight per plant and branching were the main indicators reflecting plant factors; In the third principal component, root weight, lateral root number and nodule number were the main indexes reflecting root factors; In the fourth principal component, number of grains per pod and yield were the main indexes reflecting yield factors.Branch, pod number, grain weight per plant, yield, fresh weight per plant can be used as the main reference traits for high-yield material selection. In conclusion, 100-seed weight, pod length, knot number and number of grains per pod can be used as high stability characteristics to provide reference for material selection.