Existing electrified railway contact net bearing and guide dual line synchronous replacement construction process

The invention provides an existing electrified railway contact net bearing and guide dual line synchronous replacement construction process. The process comprises the following steps that (1) vehicles are grouped, a carrier cable tray and a contact line tray are mounted on a grouped paying-off vehicle group; (2) temporary anchor lifting is carried out, a new carrier cable and a new contact line are pulled to the pulling line side of an anchor lifting column to be temporally fixed; (3) the paying-off vehicle group operates, the new carrier cable and the new contact line are synchronously paid off, before the paying-off vehicle group arrives at an anchor falling column, an old carrier cable and an old contact line are disconnected with an existing compensation device, and the end of the new carrier cable and the end of the new contact line are lifted to be connected with the existing compensation device; (4) the old carrier cable and the old contact line are demounted, and tension of the new carrier cable and t