Disclosed herein is a high-frequency induction plasma reactor apparatus for producing nano-powder, which is configured to continuously manufacture nano-powder in large quantities using solid-phase powder as a starting raw material and to manufacture high-purity nano-powder by completely vaporizing the material powder. The high-frequency induction plasma reactor apparatus comprises an upper body and a cover. The upper body is provided with a reaction pipe receiving a reactor extending vertically inside thereof, a high-frequency coil surrounding the outer periphery of the reaction pipe and a ceramic inner wall provided inside the reaction pipe. The ceramic inner wall is formed with a plurality of gas passing bores and defines a gas movement passage with the inner side wall of the reaction pipe therebetween for allowing the inflow of argon gas from the outside into the reactor. The cover is mounted to the upper end of the reactor and adapted to seal the reactor. The cover is provided with a powder injection tube communicating with the reactor.