Research conclusions:The results show as follows:(1)Under the action of temperature force,as the slab stiffness increases,the longitudinal force of pier,the slab axial force and the displacement of turnout increase.As the friction coefficient between slab and bridge increases,the slab axial force and the displacement of turnout decrease.(2)Under the action of braking force,as the slab stiffness and the friction coefficient increase,the slab axial force increases,but the longitudinal force of pier and the displacement of turnout decrease.(3)The conclusions in the article about the interactions between turnout and bridge provide the valuable reference to the design of ballastless track in the longitudinally coupled turnout area on bridge.