The main soil types in Sichuan Basin are paddy soil, purplish soil, yellow earth, yellow brown earth and brown earth. The soil samples of more than 620 sites were analyzed. The main results are summarized as follows:1. The range and mean value of the total contents of Zn, B, Cu and Mn in the soils of Siehuan Basin are 37-400 ppm with an average of 112.8 ppm, 17-370 ppm with an average of 80.7 ppm, 9-125 ppm with an average of 33.0 ppm, and 41-1750 ppm with an average of 641 ppm respectively. It is obvious that the total contents of B, Zn Cu in the soils of this region are higher than those in the soils of other regiuns in China. However, total content of Mn is lower than that in the soils of other regions in China. 2. The content of available trace elements varied greatly. The range and mean value of available B, Zn, Cu, Mn and Fe in the soils of Sichuan Basin are 0.01-1.61 ppm with an average of 0.23 ppm, 0.08-9.60 ppm with an average of 1.45 ppm, 0.1-9.44 ppm with an average of 2.53 ppm, 0.18-262.4 ppm with an average of 27.8 ppm, and 0.86-401.4 ppm with an average of 61.1 ppm respectively. The content of available B in the soils of Sichuan Basin is very low (0.16-0.29 ppm),being much more below the critical value (0.5 ppm).Although the average contents of available Zn and Mn are slightly higher, but in the most of soils, especially the calcareous purplish soil, they are lower than the critical values. The contents of available Cu and Fe in the soils of Siehuan Basin are higher. The availability of trace elements in soils are influenced by many factors. The avaiTable trace element contents in the soils of Sichuan Basin are often varied with the soil types, increased with the lowing of soil pH and increasing of organic materials. At same time, the content of available trace elements (except B) in the paddy soil are higher than that in the upland soil derived from the same parent material.