Taking the construction of Xiushan tunnel on YuxiMengzi railway as an example, the author presents the key technical points, applicable situations and boundary conditions of the major geology forecasting methods used in tunnel construction, including advance geology forecasting method, comprehensive geology analysis method, physical prospecting method, advance drilling method and advance drift method,. In addition, the author analyzes the selection of proper geology forecasting methods in tunnel construction in terms of technology, economy, convenience and applicability. This paper can provide reference for similar projects in the future.