Miniature power generation device driven by kinetic energy of seawater fluid

The invention discloses a miniature power generation device driven by kinetic energy of seawater fluid. The miniature power generation device comprises a flow guide duct, an impeller, a stator coil and a permanent magnet, the flow guide duct is sequentially divided into a water inlet section, a middle section and a water outlet section, and the middle section is of a hollow cylinder structure; a sealing isolation base and a base cover are sequentially fixed to the top of the middle section from bottom to top, a hollow flange table is arranged in the sealing isolation base, an inner cylinder is arranged in the hollow flange table, the outer wall of the inner cylinder is fixedly sleeved with a stator coil, and the inner wall of the inner cylinder is rotationally connected with a connecting shaft of the impeller through a shaft sleeve; the impeller is positioned at the middle section of the diversion duct; a permanent magnet is fixed on the inner surface of the impeller through surface mounting, the impeller rot