The bridge expansion joints is to adapt to the structure deformation of the bridge, the across device between the bridge structure each couplet of the beam end and the beam end and the abutment back set free deformation. Its role is to ensure that the bridge span structure under temperature change, concrete shrinkage and creep, load according to its static scheme under the influence of factors such as free expansion and deformation, to make the car comfortable, smooth, and waterproof, prevent mud debris into the seam. This paper mainly discusses for the types and their advantages and disadvantages of highway bridge expansion joints as well as expansion joints, and discusses the preventing and curing of diseases.