The 11 types of soils were selected from all of 17 types of soils in Shaanxi according to the distributing area and the representative. We have gather about 159 soil samples from all the province. The result of analysis showed that the average content of available silicon in soils in Shaanxi Province is about 390. 99 mg/kg, the high- est 980. 32 mg/kg, The lowest 74. 5 mg/kg. The variational tendency of content of available silicon in soils in- creases from the north to the south and decreases from the east to the west. The content of available silicon is di- rect correlation to organic matter, total nitrogen,total phosphorus in soil, is irrelevant to total potassium in soil in the south of Shaanxi.