In order to make the application of FEM software ANSYS in numerical analysis of tunnels in cold region more convenient and simple,the further-development of ANSYS was conducted on the basis of brief introduction to three kinds of further-development tools,and the methods of menu chinesization and establishing new menu were proposed.Then the dedicated modules for parameterization tunnel model and automatic calculation of insulation thickness had been established,which providing a convenient calculation method for engineering design.Finally,the applications of specific cases show that it has well practicability.