Abstract: Selecting the typical farmland in Chongzhou City of Sichuan Province,we used the geo-statistical analysis method and optimal spatial interpolation theory model to investigate the soil heavy metal pollution,and assessed the soil environmental quality by weighted Nemero index.The results showed that:(1) The average values of As,Cd,Cr,Cu,Hg,Ni,Pb and Zn in the farmland soils exceeded the soil background value of Sichuan (1990),and the Cd content of 0.42 mg·kg^-1 was 5.32 times greater than the background value; (2) Compared with the risk screening value of agricultural land in the Soil Environmental Quality Agricultural Pollution Risk Control Standard (Trial) (GB15618-2018),the farmland soils were in risks of As and Cd pollutions,and the samples exceeding the pollution risk screening values accounted for 4.0% and 42.0% of the total samples,respectively,while the other eight heavy metals contents were in accordance with the risk control standard values,indicating the area was with a friendly environment for safe agricultural product quality and crop growth; (3) By fitting the variogram,the optimal models of As and Cd in the farmland soils were exponential model and Gaussian model,respectively.After spatial interpolation analysis and quality evaluation,most study areas were at the warning levels or with risks of light pollution levels.