The invention discloses a metallurgical liquid tank, which comprises a tank shell, a lug shaft, a tank port flange, a heat insulation layer, a permanent layer, a refractory material working layer and a permanent material anchoring nail, wherein the inner wall of the tank port of the tank shell is provided with a plurality of tank port flange anchoring plates; the tank port flange is provided withanchoring plate through holes corresponding to and matched with the tank port flange anchoring plates; the anchoring plates are higher than the upper surface of the tank port flange; and the tank port flange is fixed on the upper port of the tank port by discontinuous welding with each tank port flange anchoring plate, the tank port flange anchoring plates are gradually upward away from the surface of the tank shell from a joint to the surface of the tank shell, stiffeners are arranged between the tank port plange anchoring plates and the inner surface of the tank shell. The metallurgical liquid tank is convenient to overhaul and as firm as the tank port flange is discontinuously welded, and the permanent layer and the working layer are not easily separated from the tank shell during buckling the tank.