Abstract: In order to explore the leaf variation of Michelia yunnanensis, 316 leaves from 45 branches from 9 plants in the Cuifeng Mountain of Qujing in Yunnan were observed. The results show that the range of coefficient of variation is 10.86%-56.85%, of which the ratio of length of stipule scar to that of petiole is the smallest, the base shape of leaf blade is the largest, and except for the ratio of lower width, the ratio of top width and leaf shape, other leaf characters of M.yunnanensis were significantly different in branches and plants. The character information of M.yunnanensis leaf mainly focuses on 5 characters as length, width, ratio of length to width, ratio of base length to top length, and length of petiole.