The utility model discloses a stable pressure type oxyanthraquinone production device, and relates to the technical field of production devices for preparing anthraquinone by using anthracene as a raw material through air oxidation. The device comprises an anthracene melting kettle, an anthracene vaporization kettle, a mixer, an oxidizer, a flame arrester and a condensation tank which are sequentially connected in series through a pipeline; an inlet of a self-operated steam pressure adjusting valve is connected to one end of a saturated steam supply pipeline; an outlet of the self-operated steam pressure adjusting valve is connected with an inlet of an overheated steam generator through a pipeline; an outlet of the overheated steam generator is connected to the anthracene vaporization kettle; and an adjusting valve is connected in series to the pipeline between the outlet of the overheated steam generator and the anthracene vaporization kettle. By adopting the self-operated steam pressure adjusting valve, the pressure of saturated steam supplied to the overheated steam generator is stable and unchangeable, so that relatively stable overheated steam quantity and anthracene evaporation quantity are ensured from the source to realize stability of an oxidation reaction process, the reaction yield is improved, and the labor intensity of workers is lightened at the same time.