【Objective】To grope assoeted method in vegetable soybean and analysis the genetic distance of the quantitative characters between vegetable soybean cultivars; 【Method】 According to the analysis method ,12 cultivars of vegetable soybean were analyzed. The genetic distance of the cultivars was calculated. Deviation square method was also applied to cluster analysis; 【Result】 16 quantitative characters can be simplified 4 principal components, plant type factor, yield factor, pod factor and kernel type factor. These 4 principal components can account for 91.54% variance. According to the principal components, the genetic distance between cultivars was calculated, averaging 4.63. By cluster analyzing, 12 cultivators were classified into 4 groups. It was found that some varieties whose genetic distance was close were classified into geographic distant groups, and some varieties whose pedigree was close had larger genetic distance due to the different selection criteria. 【Conclusion】 During breeding vegetable soybean cultivar, the value of the principal components should be made sure, according to target of breeding. To evaluate genetic difference of castor germless, the geography origin and pedigree couldn’t be regarded as the basis only.