▎ 摘　　要

NOVELTY - Device, comprises a plasma micro-reactor (6), whose one end is respectively connected with an argon steel bottle (1) and an injection pump through a micro-channel and a three-way valve. A mass flow control meter (2) is provided between the argon steel bottle and the plasma micro-reactor. An injection pump is used for conveying the precursor solution and the substrate solution. The other end of the plasma micro-reactor is connected with a collector (10) for collecting the product. The plasma micro-reactor comprises an internal electrode area, a reaction area, an insulating area, a grounding area and a water cooling area. An area is taken as the anode. A water cooling area is used for controlling the temperature of the liquid in the reaction. The plasma micro-reactor, an alternating current power supply (7) and a ballast form a closed loop. The alternating current power supply is connected with an oscillograph. USE - The device is useful for preparing nucleocapsid composite nano-particle. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for method for preparing nucleocapsid composite nano-particle by using the device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of device useful for preparing nucleocapsid composite nano-particle. 1Argon steel bottle 2Mass flow control mete 3Injection pump i 4Injection pump ii 5Injection pump iii 6Plasma micro-reactor 7Alternating current power supply 8Ballast 9Oscillograph 10Collector