The utility model provides an optical cable brancher, which comprises a main casing, a cover plate and an optical cable protection tube fixing piece. The main casing comprises a bottom surface, a first side surface surrounding the bottom surface, a second side surface, and a third side surface opposite to the first side surface. The side and the fourth side opposite to the second side, the first side is provided with a first opening, the third side is provided with a second opening, the size of the first opening is smaller than the second opening, and the first opening is used for the main optical cable Passing through, the second opening is used to avoid all branch optical cables to allow them to pass; both sides of the cover plate are provided with clips extending toward the main casing, and the ends of the clips are provided with elastic materials. When the cover plate is buckled with the main casing, the upper surface of the main casing is fitted with the lower surface of the cover plate, and the inner side of the claw part is connected to the buckle surface. fit, and the distance between the inner side of the claw portion and the lower surface of the cover plate is smaller than the distance between the upper surface of the main casing and the buckling surface.