Abstract: Addressing the uncertainty and arbitrariness as encountered with during the piercer plug surface oxidation treatment process，a new type oxidation furnace with pressure ≥15 MPa is designed to enhance the automation level and the certainty level of the plug oxidation processing operation. The newly-designed oxidation furnace is capable of oxidation automatic control and intelligent manufacturing of the piercer plug，featuring fine temperature homogeneity，high hi-temperature strength，and high automation level，suitability for various processes and satisfying to the requirements for high production capacity，etc. When making the plug oxidation film with the said oxidation furnace，both the oxygen potential and temperature are within the certainty range during the oxidation treatment，and the hydrogen concentration is getting changed along with the changes of the process parameters. The actual application result shows that the said oxidation treatment furnace can meet the parameter control during the production process，and bring about high efficient and consistent production of the piercer plug.