In recent years, transmission lines in some areas have been seriously affected by snow and ice weather, and the line ice coverage has reached 20mm, which has caused serious damage to the operation safety of transmission lines. The icing of the wire will cause the phenomenon of sub-range oscillation and galloping, and it can be protected by means of a rotating spacer. The optical fiber composite overhead ground wire plays the dual role of information transmission and lightning protection in the transmission system. In order to protect communication security, most of the lines operate by tower-by-tower grounding. There is no good protection for its ice coating, and it has always been a key research topic in the industry. Therefore, after an effort to develop a ground-line melting ice-insulated Fiber Closure, when the fiber-optic composite overhead ground wire is used in the construction connection, the fiber closure is used for insulation connection. Once the line is severely covered with ice, the normal operation of the line is endangered. Coordination, insulating at both ends of the ice-covered section of the fiber-optic composite overhead ground line, and then paralleling the fiber-optic composite overhead ground wire and the two-phase wire to form a closed loop for online ice melting. The novel ground melting ice insulated fiber closure relates to an optical fiber composite overhead ground wire insulated fiber closure, belonging to the technical field of optical fiber communication equipment, and used for optical fiber composite overhead ground wire melting ice fiber closure to realize optical cable connection. The box is insulated from the tower. The utility model comprises a box body, an insulator and a tower clamp, the box body comprises a box body cover and a box body base, and the box body cover is matched with the box body base; the box body cover is provided with a fiberboard plate for melting the optical fiber, and the box body base A through hole is arranged at the bottom for the OPGW cable to pass through, and the OPGW cable is pressed and fixed by the cable pressing device; the two ends of the insulator are provided with a thread, one end is connected with a nut to the insulator fixing plate, and the other end is connected with a nut by a nut. The plate on the base of the box is connected to the insulator fixing plate for fixing the box body; the tower clamp comprises a front plate and a rear plate. The ground melting ice insulated fiber closure is convenient, safe and reliable, and effectively protects communication security.