Based on the diversity of soil constitutive models, the finite element method was used to establish model and analyze soil pressure subsidence. According to the application of finite element calculation method in soil mechanics analysis, the pressure subsidence curves obtained under different soil mechanics parameters were fit to obtain the soil pressure subsidence characteristic curve, and the influence made by soil parameter elastic modulus, Poisson's ratio, internal friction angle and cohesion on double exponential model parameters were analyzed. Finally, a double exponential model of soil pressure subsidence is presented. The test results show that it is feasible to fit the pressure subsidence relationship of wet clay by double exponential model. This method has reference value for the study of the establishment and analysis of soil pressure subsidence model.