Abstract: Leaf traits of 10 provenance resources were determined, and the genetic variations of leaf from different provenances were analyzed. The results showed that variance coefficient of 6 leaf traits ranged from 1648%~4126%, and significant difference of leaf traits existed from different provenances. There existed high heritability in footstalk length and leave area, reached more than 70%, the other four leaf traits reached more than 45%, the difference of Melia azedarach leaf traits is controlled by genetic control to a certain degree. Their coefficients of the regression equation were greater than 070 except the provenance of Xingning, and there were significant correlation between leaf traits and latitude, altitude, annual average temperature, annual rainfall, frostfree period, annual average sunshine, there was significant positive correlation between plant height and the ratio of leaf length/width. The crown breadth was negatively correlated with leaf area, positively correlated with the ratio of leaf length/width. Using the cluster analysis of 6 leaf characteristics of Melia azedarach, 10 provenances can be divided into 2 types.