Taking the new TBM boots as the research object, the force transmission characteristics between the boots and other mechanisms are created according to the three-dimensional model of the test bench. The contact model between the boots and the surrounding rock in the double-support working mode is established, and the finite element method is used to study the support. The stress and displacement distribution of the contact surface between the boot and the surrounding rock shows that the comprehensive stress distribution of the support shoe and the surrounding rock is relatively uniform, and it is distributed within the range of in the circumferential dimension. The maximum stress on the contact surface is 13 MPa, and the maximum stress on the contact surface of the surrounding rock is 4.03 MPa. The comprehensive displacement of the contact surface of the support shoe is small in the middle and large at both ends, and the displacement at the contact surface of the surrounding rock is large, and the displacement to the periphery gradually decreases. The analysis results provide some reference for improving the stability of the whole machine.