Accurate installation method of cable-stayed bridge girder cable guide pipe

The invention provides an accurate mounting method of a cable-stayed bridge girder cable conduit, which comprises the following steps of: lofting a perforation position of the cable conduit on a template, and forming a square notch at a corresponding position of the template; welding a cable conduit placing platform A on the template, and measuring and setting out coordinates on two sides of a cable conduit bottom anchor backing plate; a worker is matched with a tower crane to lift the cable guide pipe, so that the two corners of the cable guide pipe bottom anchor bearing plate coincide with the marks of the coordinate points; an axis centering tool C is installed on an upper pipe opening of the cable guide pipe, the axis centering tool adjusts the position of the upper pipe opening up and down based on the total station, and alignment is completed; a cable guide pipe stiff framework steel support is installed, after a cableway pipe anchor cushion plate is anchored, a steel plate presses a formwork notch, and