The invention discloses a guy cable type high-altitude working platform, which comprises a plurality of groups of single-lift-point platforms consisting of lifting machines, lifting machine mounting frames, platform standard joints, end part guard rails with supporting legs, reinforcing guy cables, fixing pins of reinforcing guy cables and cable tensioners, wherein the platform standard joints are symmetrically tensioned by penetrating a plurality of reinforcing guy cables through the lifting machine mounting frames in the single-lift-point platforms; pre-tightening force of the guy cables can be adjusted through the cable tensioners; and the groups of single-lift-point platforms are connected through bolts to form the guy cable type high-altitude working platform. According to the invention, by rationally arranging the positions of the lifting machine mounting frames and by using a stay cable structure, the dead weight of the structure is reduced, the rigidity of the platform is effectively improved, and the deformation of the platform in work is reduced in the design of the construction platform with limited number of suspension lift points; meanwhile, the platform has the characteristics of convenience in disassembly, assembly and transportation; and the requirements of construction equipment with limited large-span lifting points.