External communication interface device for communication signal machine cabinet

An external communication interface device used for a communication signal machine cabinet belongs to the communication field, and comprises a butt joint device, a fixing device and a wire harness adjusting device, the butt joint device is plugged with the fixing device, the wire harness adjusting device is slidably connected with the butt joint device, the butt joint device comprises a pedestal, a plugging column and an elastic separation blade, and the pedestal is connected with the fixing device. A threading hole penetrating through the thickness of the base is formed in the base, a sliding hole is formed in the side wall of the threading hole, inserting columns are vertically fixed to the base, elastic blocking pieces are obliquely fixed to the inserting columns, and the number of the inserting columns is multiple. According to the utility model, the problems proposed in the background technology can be solved, the problem that signal transmission is influenced by the fact that the wiring harness is easy