In view of the important role of interchange exit ramp in expressway system,based on relevant literature and engineering practice,this paper analyzes the key points of safety design of interchange exit ramp.At the same time,it focuses on the content and purpose of the safety design of the lane.Finally,on the basis of relevant research,the AHP method is used to construct the safety design evaluation system for highway exit ramp,which can be used to systematically evaluate and compare the safety of different design schemes,and targeted improvement measures are put forward.