Abstract: There are many geological hazard accidents in the tunnel construction especially under the condition of complex geology, such as the strong weathered sandstone and the landslip of the faulted fracture zone. The construction risk is reduced effectively, the construction security and the progress are guaranteed and the project accident's occurrence is reduced by the accurate advanced geological forecast. According to Fujiachong tunnel engineering of Yiba highway in Hubei province, based on the TSP advanced geological forecast, its basic principle and method are introduced and its application is evaluated. The result is proved during the construction, which indicates its reliability.