The invention relates to a manufacturing method and corresponding saddling method for a preformed cable strand of a main cable of a suspension bridge, comprising the following steps: designing the sizes and sections of the cable strand before and after the cable strand is preformed according to the size conditions of main and vice cable saddles; shaping the cable strand from a regular hexagon to a quadrangle: firstly shaping the cable strand into the quadrangle in the preformed position, corresponding to the main and vice cable saddles, of the cable strand by adopting a shaping machine tool of which the cavity is quadrangular, and then fixing by adopting a fixed clamp of which the cavity is quadrangular sequentially for several times; winding the outside of the fixing part with a winding belt for sizing; and coiling, packaging, and then delivering. According to the invention, the cable strand is preformed in a factory, namely that the hexagon is shaped into the quadrangle so as to meet the requirement for the shape of the section of the cable strand during saddling, thereby achieving the purposes that the saddling process is facilitated and the quality of the cable strand is effectively guaranteed after the cable strand is erected.