The invention discloses a rare earth steel anti-oxidation protecting pouring device which comprises a first pipe frame, a pipe frame, buckles, an air inlet quick-change connector. The head and the tail of the first pipe frame are connected and communicated with each other, the upper plane of the first pipe frame is provided with an exhaust through hole, two ends of the pipe frame are connected to an outer side wall of the first pipe frame, the pipe frame is communicated with the first pipe frame, the buckles are arranged on outer walls of two sides of the pipe frame and are matched with buckles arranged on a base plate, and the air inlet quick-change connector is arranged on an outer wall of the end of the pipe frame and is communicated with the pipe frame. The invention further discloses a using method for using the rare earth steel anti-oxidation protecting pouring device. The rare earth steel anti-oxidation protecting pouring device can guarantee that the bottom of a steel ladle maintains the atmosphere of an inert gas, and the problem of oxidation nodulation blockage caused by the fact that a water opening at the bottom of the steel ladle is in contact with air during rare earth steel pouring is solved.