Slab tundish upper nozzle capable of preventing oxygen uptake and manufacturing method of slab tundish upper nozzle

The invention discloses a slab tundish upper nozzle capable of preventing oxygen uptake, which comprises a tundish upper nozzle body, a ventilation groove is arranged at the bottom of the tundish upper nozzle body, the ventilation groove is communicated with an argon blowing channel arranged on the tundish upper nozzle body, a graphite screwed plug is arranged at the inlet of the argon blowing channel, and the graphite screwed plug is communicated with the ventilation groove. A ventilation plug is arranged at the ventilation groove, and the ventilation plug has certain incoherent porosity; according to the manufacturing method, the ventilation problem is solved through the ventilation plug with the incoherent porosity, a water gap does not need to be replaced no matter whether argon is blown or not, the production cost is saved, and the problems that in a traditional manufacturing method, the punching difficulty is large, and the rejection rate is high are solved. 本发明公开了一种防止吸氧的板坯中间包上水口，包括中间包上水口本体，在所述中间包上水口本体底