Abstract: It is important to reveal the relationship between soil cultivation layer thickness (SCLT) and geographical factors that will be benefit for soil protection, field management and land sustainable utilization. In this study, a total of 472 surveyed soil sites in Bijie city were used to evaluate such a relationship combined with geostatistics, IDW and Person analysis methods. The results showed that the SCLT of Bijie city was 15.9 cm in average that is less than 16.5 cm of the average of the country. 86.88% of the area fell in the range of 10.1-20.0 cm in SCLT. However, a great variation could be observed with the maximum being 35 cm and the minimum being 2 cm in SCLT. In the spatial distribution, the SCLT in the west part was larger than the east of Bijie city and the zones of SCLT lower than 5.0 cm or larger than 25.0 cm were distributed in island shape in the region. Regress analysis suggested that SCLT was positively related to altitude but not to the hill slope, direction and shape. In generally, the area with more than 10 cm in SCLT accounted for 92.63% of the city that influenced little by the geographical factors and the SCLT was suitable for tobacco planting.