This kind of Fusion Splice-on Connector is actually an optical fiber fusion, however the welding point is in the inner end of connector, which makes it no necessary for extra protection equipment, such as fiber protection plate(optical fiber splice tray), optical fiber terminal box, optical fiber distribution frame, after it finished splice fusion. The factory pre-polished ferrule eliminates the need for polishing, adhesives, and crimping in the field, which minimizes the potential for operator error and expensive connector scrap. Compared to mechanical optical fast connector, this new practical connector save V-groove mechanical connector maintenance and can improve the span life of welding point of connector and reduce maintenance cost.