Tundish nozzle capable of improving corrosion resistance of slide gate brick

The utility model provides a tundish nozzle capable of improving the corrosion resistance of a slide gate brick. The tundish nozzle capable of improving the corrosion resistance of the slide gate brick is mainly composed of an upper nozzle body, an upper slide plate connected with the upper end of the upper nozzle body, a seat brick connected with the upper nozzle body, a lower slide plate attached to the upper slide plate in a connected mode, a lower nozzle body connected with the lower slide plate and a molten steel channel on the upper nozzle body and the lower nozzle body. The upper end face of the seat brick and the portion, on the upper nozzle body, of the molten steel channel are coaxially connected with a stop platform. A composite oxide storage groove is formed in the upper end face of the seat brick. By the adoption of the tundish nozzle, Ca-Mg-Al composite impurities generated at the bottom of a tundish can be prevented from flowing into the nozzle, the possibility that the slide gate brick is corroded can be remarkably reduced, the service cycle of the nozzle is prolonged by at least three continuous casting heats, in this way, the casting efficiency is improved, maintenance workload is reduced, and implementing is easy.