Plasma activated oil treatment device

The invention discloses a device for preparing plasma activated oil. The device comprises a discharge module and an annular grounding device which are oppositely arranged in the axial direction from the top to the bottom. A gap is arranged between the discharge module and the annular grounding device. The annular grounding device is internally provided with a cavity for storing the oil liquid. Thegap is communicated with the cavity. The discharge module comprises a metal base, multiple current limiting resistors and multiple corresponding metal needle electrodes from the top to the bottom. The first ends of the current limiting resistors are arranged on the bottom surface of the metal base, and the second ends are connected with the rear ends of the metal needle electrodes. The front endsof the metal needle electrodes are opposite to the annular grounding device. The device can produce low temperature plasma at the atmospheric pressure, and the plasma can directly process the activated oil so that the require