Research conclusions:(1)Although metamorphic strata are hard rocks，because of complicated geological condition， possibility of deformation and failure of surrounding rocks increases.(2)On the basis of field construction and measurement，information design is adopted in Yanmenguan tunnel construction to effectively control large deformation， thus assuring construction safety and controlling the engineering cost simultaneously.(3)Some technology are put forward such as tough supporting and rapid closing, setting temporary invert，grouting reinforcement with long rope bolt， using pipe roofs for clearance-intrusion treatment and reinforce secondary lining, etc. (4)The research results have extensive application values for tunnel design in complicated geological condition.