Downward-flow-type mixed-phase lathe hydrotreater with degassing tank

The utility model relates to a downward-flow-type mixed-phase lathe hydrotreater with a degassing tank. The downward-flow-type mixed-phase lathe hydrotreater comprises a pipeline hydrogen injection mixer, a reactor, the degassing tank and an oil circulating pump, wherein the pipeline hydrogen injection mixer is connected with the inlet of the reactor through a pipeline; the degassing tank is provided with a top outlet and a bottom outlet; the bottom outlet of the reactor is connected with the inlet of the degassing tank through a pipeline; the bottom outlet of the degassing tank is connected with the oil circulating pump through a pipeline; and the oil circulating pump is connected with the pipeline hydrogen injection mixer through a pipeline. The device provided by the utility model can be used for improving the deep hydrogenation effect to an oil product, has the characteristics of strong treatment capacity and stability in operation, and is suitable for the technical field of chemical industry.