This paper uses ABAQUS to make a numerical simulation of the indoor model test of double-layered soil with upper crust. Through the analysis of the contours of equivalent plastic strain and displacement vector, the failure mode of double-layered soil is proved to be punching failure. With the increase of upper crust thickness, the expansion of plastic deformation area in sub-soil delays while double-layered soil bearing capacity slightly improves. The curing agent which contains cellulose enhances the strength of upper crust, so that it helps to increase the bearing capacity. In terms of the failure characteristics and ultimate bearing capacity, the results of numerical simulation close to that of indoor model test.