Introduced the construction method of Qianshan tunnel and the tunnel monitoring and measuring contents，and through the analysis of the monitoring results, concluded that the tunnel of different rock levels in the corresponding support conditions were basically identical in displacement deformation trends: the deformation in the initial 10 d increased rapidly and then slowed down, to around 30 d basically reached stable; the deformation of bench method from big to small is the upper stage, the middle stage and the lower stage, and the lower stage excavation has obvious impact on the upper stage deformation. Provides reference basis for reasonably confirming the time of secondary lining, and also provides reference for construction engineering under similar geological conditions.