Abstract: Maole expansion joint is a kind of new structure of bridge expansion joint, installation of which is quite complex. Writer has been engaged in the railroad high-level bridge engineering and familiar with the installation of Maole expansion joint. The thesis recommend how to control the notch dimension of Maole expansion joint, how to hoist、install、adjust and joint steel bar. It analyses the calculation means of expansion data. It further expounds how to pay attention some of familiar problem during installation of Maole expansion joint. The thesis can be referenced by builder.