Horizontal continuous casting tundish with negative pressure device

The utility model discloses a horizontal continuous casting tundish with a negative pressure device. The horizontal continuous casting tundish with the negative pressure device is a rectangular cone container with an open upper end and comprises a tundish bottom, a front wall, a rear wall and two sides, a tundish cover is arranged above the tundish, a heat accumulating type roaster is arranged on the tundish cover, a tundish water opening is arranged below the tundish front wall, a negative pressure device is arranged at a tundish water opening channel to generate negative pressure at the tundish water opening channel so that heat flow in the tundish is guided to the tundish water opening channel to change the original direction of roasting heat flow of the tundish so as to quickly roast the tundish water opening and tundish bottom, and the negative pressure device consists of an air discharge pipe, a compressed air pipe, an air blower and a bracket, wherein two steel pipes with different diameters are welded