The cable connector box is mainly suitable for the direct and branch connection of the overhead, pipeline, direct buried and other laying methods of the cable of various structures. It is used for the protective connection and optical fiber distribution between two or more optical cables, and is one of the common equipment of user access points. It mainly completes the outdoor connection between the distribution optical cable and the household optical cable, and can install the box or simple optical splitter according to the FTTX access needs.