The utility model provides a self-centering extrusion mold. The extrusion mold comprises a mold core and a mold cover, wherein four positioning pins are arranged on an outer conical surface of the mold core and are fixedly connected on the mold core; an annular platform is arranged at the tail end of an inner conical surface of the mold cover; and the inner diameter of the annular platform is connected with the outer diameters of the positioning pins of the mold core in a matching manner. The extrusion mold can achieve self-centering, thus reducing the time for concentric adjustment, improving the production efficiency and the product production consistency and saving the raw materials of sheaths and the cost.