Abstract: The shear strength indices of deep foundation pits in Wuhan area are generally acquired through direct shear tests. They are simple and locally applicable and fails to simulate the natural state of soils. Thus, the soil strength parameters obtained have certain limitation, and the correlations of physical and mechanical properties are also vague. In order to study the correlations of physical and mechanical properties of typical soft soils in Wuhan, based on the deep excavation of soft soils in Wuhan area, four hundred groups of data from 10 projects in Wuhan are adopted. Physical and mechanical parameters of soft soils in Wuhan are studied. Combined with the traditional methods of mathematical analysis, the engineering geological characteristics are investigated, and the correlations between the physical and mechanical parameters and their indices are analyzed. The results show the physical indices of typical soft soils, such as natural density, dry density, liquid limit, plastic limit and saturation, are in normal distribution. The statistical distribution of shear strength indices indicates that the normal distribution of physical parameters will change with different experimental conditions for different soils.