The utility model relates to a novel flow-control device for a double-flow plate blank continuous casting tundish, which comprises a tundish, a turbulent flow controller, slag stopping dams, and slag stopping walls, wherein the turbulent flow controller adopts a round platform shape grooved structure, and a ring-shaped wrinkle protrusion layer is arranged at the bottom of the inner side of the turbulent flow controller; a fringe protruding inward is arranged on the edge of the top, and the upper side lengths of each slag stopping wall and each slag stopping dam are longer than the lower side lengths of the slag stopping wall and the slag stopping dam, the turbulent flow controller is arranged in the center of the bottom of the tundish, the slag stopping walls are symmetrically arranged on the two sides of the center in the cover of the tundish, the slag stopping dams are perpendicular to the cover of the tundish, the slag stopping dams are symmetrically arranged between the center of the bottom of the tundish and the upper nozzles on two sides, and the slag stopping dams are perpendicular to the bottom of the tundish. The vertical distance L1 between each slag stopping dam and the center line of a long water gap is larger than the vertical distance L2 between each slag stopping wall and the center line of the long water gap. Compared with the prior art, the utility model has the benefits as follows: the device has a simple structure, is reasonable in design, and can effectively prolong the average residence time of molten steel in the tundish and control the turbulent flow degree of the molten steel.