The invention discloses a novel slag stopping rod suitable for tapping slag stopping of a 50t-180t converter. The novel slag stopping rod is composed of a cone body and a rod body with one end inserted into the cone body. The surface of the cone body is provided with four grooves. The four grooves are arranged at equal intervals in the circumferential direction of the cone body. Each groove extends from the position 20-25 cm away from the top end of the cone to the bottom end of the cone. The novel slag stopping rod has a good slag stopping effect and solves the problem that in the tapping process, a cone body of a slag stopping rod is molten by molten steel, becomes smaller, causes dredging of a tapping hole to be difficult and even falls off from the inside of the tapping hole.