Optical fiber splicing box, also known as the terminal box, is the final connector of a optical cable, his one end is the optical cable, the other end is the pigtail, which is equivalent to the equipment that divides a optical cable into a single optical fiber, installed on the wall of the user optical cable terminal box, its function is to provide optical fiber and optical fiber welding, optical fiber and pigtail welding and optical connector. It also provides mechanical protection and environmental protection for the fiber and its components, and allows for proper inspections to maintain a high standard of fiber management.