Assembly type tower used for cable lifting system and erection method

The invention discloses an assembly type tower used for a cable lifting system and an erection method. The tower comprises two tower bodies arranged vertically. Each tower body is spliced by multiplestandard unit sections and cable saddle unit sections through bolts. The standard unit sections and the cable saddle unit sections each comprise multiple uprights and multiple web members arranged between the uprights. Cable saddle buckling platforms are further arranged at the tops of the cable saddle unit sections. Multiple lateral combinations are connected between the two tower bodies. The tower further comprises a crossbeam connected between the top ends of the two tower bodies. The tower is assembled by the multiple standard unit sections and the cable saddle unit sections, the erectionspeed and the largest height are superior to those of a traditional universal bar tower, the form of the tower is simple, all bars are connected through the bolts, installation and detachment are easy, the standard bars of the