Objective To study the digit ratio of the Hui and the Han ethnic groups in Ningxia, analyze the mean values of left and right hands of different sexes and nationalities, and compare the characteristics of mean values distribution in different races. Methods Physique measurements were used to study the digit ratios （2D：3D; 2D：4D;2D：5D;3D：4D;3D：5D;4D：5D）of left and right hands of 412 individuals (219 males, 193 females) of the Hui and 439 individuals (241 males, 198 females) of the Han nationalities. Results Mean values of digit ratios present a trend as: 2D：3D<2D：4D<3D：4D<2D：5D<4D：5D<3D：5D. Significant differences of 2D：3D;2D：4D;2D：5D of left hands and right hands were found between males and females in the same nationality（P<0.05）. Females had higher mean values than males.For the same sex, there was no significant dif