Objective To explore the somatotype characteristics of Zhuang-Dong ethnic groups in China.   Methods The Heath-Carter somatotyping method  was used to study the somatotypes of 9965 (male 4312, female 5653) cases from 15 Zhuang-Dong language groups.   Results The average somatotype of males in the Zhuang-Dong ethnic group were 4.1-5.2-1.9, which belonged to the mesodermal somatotype of partial endoderm, and the mean somatotype of women were 5.5-4.9-1.3, which belongs to the endoderm somatotype of partial mesoderm. Except for endomorphy factor and SAM, height, weight, mesomorphy, ectomorphy and HWR of all age groups of males were greater than those of females. There were statistically significant differences in somatotype among the three age groups among the sexes of the Zhuang-Dong language group. The weight, height, and ectomorphy of men and women were negatively correlated with age, and endomorphy were positively correlated with age. Among them, the male mesomorphy was not correlated with age, and the female mesomorphy was positively correlated with age. The differences between male and female three-factor value age groups were statistically significant.   Conclusion The somatotype of male and female of Zhuang-Dong ethnic group has obvious changes with the increasing of age, and the southern ethnic group has the characteristics of low linearity, well-developed bones and muscles, and plump body fat.