The invention discloses a method for cumulatively mounting a cable dome tower lifting cable rod, which comprises the following steps: mounting a lifting tower slightly higher than the mounting height of the vertex of a cable dome structure according to the design elevation of a cable dome and a corresponding position of a central bearing member; mounting a multipoint synchronous lifting device on the top of the tower; connecting an inner ring cable system of a notochord net with the central bearing member and connecting an outer ring cable system of the notochord net with an outer ring beam through auxiliary traction cables; evenly lifting the central bearing member through a lifting device on the top of the tower with the traction of an outer ring notochord and the lifting of the central bearing member in the lifting process, wherein the whole notochord net is lifted synchronously in a catenary mode; cumulatively and expansively mounting each ring cable, masts and stay cables positioned at different mounting heights while lifting the central bearing member; and after all the traction cables and the masts are mounted, forming outer ring stayed cables through tensioning by stages.