The invention discloses a cable label printer. The cable label printer comprises a machine frame, wherein a supporting part capable of supporting a cable is arranged on the machine frame, a spray gunis arranged on one side of the support part in an axial telescopic mode, a nozzle matched with the cable in a corresponding position mode is arranged at the outer end part of the spray gun, the spraygun is connected to an ink box, and the machine frame is further provided with a control chip, a control panel, a power supply assembly and an input assembly which are matched with one another. According to the cable label printer, labels added by the corresponding cable can be kept clearly and easily identified in the cable using process.