Abstract: For silt,the relationship between the strength of stabilized soils with various cement contents and the cement content was investigated experimentally,and the formula of cement contents for wrapping soil particle and filling pore during the structural formation of the stabilized soil was derived.Then,the relationship between effect of cement content on the structural formation and the increase of the strengths of the stabilized soils with various cement contents was analyzed,and it was shown that the structural formation of stabilized soil consisted of soil particle cementing and pore filling.