Abstract: Taking the construction of a station of Qingdao Metro as an example, by adopting combination of numerical simulation and field monitoring, the deformation pattern and control of primary arch cover construction method is studied. The results show that: Excavation of the middle guide of the arch cover, construction of the arch cover and removal of temporary support are some of the key procedures during station construction. In the operation stage of arch cover, the stress forced on arch foot and arch shoulder is switching between each other frequently, and the settlement deformation is obvious. Removal of temporary support results in secondary stress release of arch surrounding rock, which requires certain supporting measures to control the settlement. Maximum value of settlement trough moves as excavation progress advances. Until the middle guide tunnel is excavated, the maximum settlement gradually moves to the center line of the tunnel. Appropriately reducing the length of footage and increasing the stiffness of the support system have positive influence on controlling the deformation rate and magnitude of the station structure.