Abstract: In order to analyze the effects of leaf nutrient elements on nut quality of superior Juglans sigillata in Qiannan Prefecture, the variance analysis and correlation analysis were used to research the correlation between leaf nutrient elements and nut quality. The results showed that there was a significant difference in nut quality indices of different varieties of superior Juglans sigillata tree; the calcium, copper and manganese of leaves significantly influenced the nut quality of superior Juglans sigillata tree. The nut quality of superior Juglans sigillata tree could be improved by nutrition diagnosis of leaves.