A plasma body jet flow device belongs to a plasma body generating device and aims at producing plasma body jet flows with long distance, low temperature and rich active compositions, the electrode position is safe, the device is applied in a plurality of discharge. The high voltage electrode of the invention is arranged in an inner dielectric tube and commonly located in an outer dielectric container, power supply is connected with the high voltage electrode, the outer dielectric container is communicated with a working gas source, the inner dielectric tube takes a hollow tubular shape with a sealed single end, the sealed end of the inner dielectric tube is provided with conducting materials which are communicated with one end of the high voltage electrode, the other end of the high voltage electrode in the inner dielectric tube is provided with an insulating plug, and the high voltage electrode is fixed by the insulating block head and the conducting materials. The invention has easy manufacture, good maintenance, safe and convenient use, wide working gas range and changeable temperature, length and thickness of the plasma body jet flows, further develops the range of application of a plasma body technique, and increases the application effects of the plasma body.