Inner riser steel ingot mold for rolling

The utility model relates to an inner riser steel ingot mold for rolling. The inner riser steel ingot mold comprises a riser, an ingot body, an ingot tail, a trunnion, a snapping table, a boss and a mold bottom hole, the dead head is correspondingly arranged at the top end of the ingot body and adopts an inner dead head type design; the ingot tail is correspondingly arranged at the bottom end of the ingot body; the inner cavities of the dead head, the ingot body and the ingot tail are correspondingly and completely communicated, and the junctions are in smooth tangent transition; an inner cavity of the ingot body is a frustum-shaped cavity with a large upper part and a small lower part; an annular boss is arranged at the joint of the upper end of the inner wall of the ingot body and the inner wall of the riser; a snapping table is arranged on the edge of the inner side of the boss; the die bottom hole is formed in the bottom of the ingot tail; the trunnions are arranged on the upper portion and the lower port