The study of soil selenium distribution and its influencing factors is of great significance for understanding the spatial distribution of selenium in certain regions，regional agricultural product safety and human health.The study collected 701 representative surface soil samples in Zunyi，and analyzed their selenium concentrations.GS+ software was used to build a semi variant function model，and the ordinary kriging method was used to predict the spatial distribution of selenium in the surface soil of Zunyi.In addition，the potential effects of soil pH，soil TN，soil organic matter，altitude and soil parent material on the concentration and distribution of soil selenium were also discussed.The results show that the total soil selenium content in Zunyi is ranged from 0.10 to 2.90 mg·kg-1 with the mean value of 0.56 mg·kg-1，which belongs to the category of enough selenium soil and rich selenium soil.There is a soil selenium rich zone in the northwestern and southern region of Zunyi.The content of soil total selenium has no correlation with pH，but has a significant positive correlation with soil TN，soil organic matter and altitude.In addition，the selenium rich strata and the widely exposed coal seam with high selenium content in Zunyi are also suspected to be the main factors which affect the the selenium concentrations in the soil.