Abstract: 14 phenotypes from 9 populations were investigated and the phenotype diversities within and inter-populations were analyzed by adopting the methods of nested analysis of variance, coefficient of variation, correlation analysis and cluster analysis. The results are as follows: The phenotypes of Styrax tonkinensis present abundant variations within populations and groups; the phenotypic differentiation coefficient is 59.08% within populations, which is higher than that within groups; The average coefficient of variation of 4 kinds of phenotypes, collateral, leaves, fruits and seeds, are 31.02%, 16.85%, 8.2% and 6.6% respectively, it appears that seed stability is the highest, while the collateral stability is the lowest; Seed 1000-grain weight has very significant positive correlation with individual traits of collateral, leaves, fruits and seeds, while significantly negative correlation with shape index of leaves, fruits and seeds .Among the 14 phenotypes, only leaf length, leaf area and seed length, seed aspect ratio present one-way variation pattern of latitude and longitude; 9 natural groups of species Styrax tonkinensis could be divided into 3 classes through the clustering analysis of phenotypes.