Objective To observe choroidal thickness （CT） and its relationship to refraction and axial length （AL） in children 8-10 years old with normal vision. Methods In this cross-sectional study， 75（150 eyes） 8-10 years old children with normal vision were enrolled. Standard optometric refractive error was used to divide the children into three groups， a hyperopic group （A）， an emmetropic group （B） and a myopic group （C）. Using axial length （AL） tertiles， the children were divided into the following groups： 20.35-22.42 mm group （D1）， >22.42-24.49 mm group （D2）， and >24.49-26.56 mm group （D3）. Thickness in the enhanced images of the EDI SD-OCT apparatus can be obtained with a cross-sectional view of the choroid by using the scan line distance from the fovea with both horizontal and vertical scans. The choroidal thicknesses from the 9 macular sectors were used． Subfoveal choroidal thickness （SFCT） and CT at 1 mm/3 mm nasal， temporal， superior， and inferior to the fovea （N1， T1， S1， I1， N3， T3， S3， I3） were measured. The differences in CT between the different quadrants were compared for gender， eyes， refraction and AL． Results The average SFCT was 297.44±55.32 μm. When the SFCT was compared to each of the CT quadrants， only N1， N3 and I3 showed statistically significant differences （P<0.05）． The differences in the SFCT values between girls and boys were statistically significant （t=-3.00， P<0.01）. SFCT values for hyperopic girls were greater than for emmetropic and myopic girls. The differences were statistically significant （P<0.05）. The difference between emmetropic and myopic girls was not statistically significant （P>0.05）. There were no statistically significant differences between the refractive groups of boys （P>0.05） or for their different axial length groups （P>0.05）. There was a positive correlation between refractive status and SFCT （r=0.435， P<0.05）. And there was a negative correlation between SFCT and AL （r=-0.542， P<0.05）. Multiple linear regression analysis showed that with each additional 1 mm increase in axial length， SFCT decreased 23.58 μm （?/sx=848.82-23.58X）. Conclusion The average SFCT in children 8-10 years old with normal vision was 297.44±55.32 μm. Axial length is the main influence affecting choroidal thickness.