The utility model discloses a cable-stayed bridge cable robot movement device, which comprises a machine frame, wherein a plurality of power climbing mechanisms are arranged on the machine frame, climb along the surface of a cable and are uniformly distributed along the circumference direction, each power climbing mechanism comprises a power mechanism and two climbing mechanisms, the corresponding two climbing mechanisms are arranged up and down, and are connected by a synchronous transmission mechanism, each climbing mechanism comprises a roller, the roller of one climbing mechanism is driven by the corresponding power mechanism to rotate, and each synchronous transmission mechanism drives the rollers of the corresponding two climbing mechanism to synchronously rotate. The cable-stayed bridge cable robot movement device has the advantages that the miniature effect is realized, the weight is light, the property is reliable, and the application range is wide; the purposes of detection and maintenance under different conditions are assisted to complete; the problems of manual detection and repair, heavy carrying machines and low efficiency of the existing cable-stayed bridge are solved; the labor intensity and risk of detectors are decreased, and the reliability is improved.