Using the data separation technology, based on the data extracted from the 1:250000 available and regional geochemical data of the content of natural radionuclide(²³⁸U, ²³²Th, ⁴⁰K) in different type soil in Chengdu Economic Area, field sampling and analysis were carried out. Then, the distrbution characteristics of natural radionuclide content in different type soil were studied in this area. The results showed that:(1) The contents of natural radionuclides in the area soil were at the same level with the world, the whole nation and Sichuan Province.(2) The contents of ²³⁸U in yellow soil, brown soil, purple soil, paddy soil, gray soil and grass mat soil were 3.18, 2.40, 2.12, 2.45, 2.48, 2.73, respectively, the average was 30.41(the unit was 10^-6 g/g); the contents of ²³²Th were 14.27, 14.64, 11.67, 13.98, 13.41, 14.09, the average was 54.35(10^-6 g/g); the contents of ⁴⁰K were 2.06, 2.38, 1.94, 1.74, 1.83, 2.22, the average was 1.98(10^-2 g/g);(3) The contents of natural radionuclides in different type soil showed up the rules as following:the content of ²³⁸U in yellow soil >grass mat soil >gray damp soil >paddy soil >brown soil >purple soil; the content of ²³²Th in brown soil >yellow soil >grass mat soil >paddy soil >gray damp soil >purple soil; the content of ⁴⁰K in brown soil >grass mat soil >yellow soil >purple soil >gray damp soil >paddy soil;(4) In the same type soil, the natural radionuclide content of plain soil was lower than that of mountain.