The invention discloses a cable tunnel arc-shaped support integration machining shaping method, and belongs to the field of machining. The method comprise the steps of forming a fixed through hole in a longitudinal support, and analyzing the rules that beforehand batch molding processing holes suffer stress changes and finally permanent deformation under bending stress caused due to factors of different bending directions, different bending degrees and the like of different brands of straight materials through finite element modeling; under the premise that the length of a longitudinal support section bar and relevant parameters of the fixed through hole are known, giving full considerations to influences of a bending technology on hole spaces and hole pattern changes, conducting prefabricating processing of fixed through holes on the straight materials of the longitudinal support, adopting an integrated machining and molding technology, and then conducting bending processing on the straight materials. In this way, the positional accuracy of each fixed through hole of the longitudinal support under the bending state can be guaranteed, the positioning deviation and accumulated errors generated due to repeated movement of the support in the hole punching process of the longitudinal support can be avoided, the processing cost can be effectively reduced, and the processing efficiency and precision are improved. The cable tunnel arc-shaped support integration machining shaping method can be widely used in the field of processing of tunnel arc-shaped supports.