The object is to probe the variable rule of leaflet by analyzing scatter character and site node of different types of leaflets in Zhonghuang 55. The result indicate that, there are seven groups consisted with a total of 13 leaflets, in which 5 leaflets have not been reported. The main compound leaf was normal triple-leaflet type, following with the 4 leaflets of D1 type. Analysis of variance showed that significance differences exited among ratios of difference leaflet types, which indicated the leaf types and their ratios were affected by environments. The ratio of ternately compound leaf increased at first, then decrease from low nodule to high nodule, while the ratio of ternately compound leaf from branch at different nodule have little change. The study will broaden our acknowledge to soybean leaf.