Bionic fish-shaped power generating set

The invention discloses a bionic fish-shaped power generating set which comprises a Venturi tube, a closed cavity and a power generator. The Venturi tube is of an axial penetrating structure; the closed cavity is mounted to the axial penetrating structure through a plurality of supports; the power generator is installed in the closed cavity. The closed cavity is a bionic fish-shaped sealed cabin, and a tail rudder for regulating direction of the bionic fish-shaped sealed cabin is connected to the tail of the bionic fish-shaped sealed cabin. Since a core assembly of the power generating set is mounted in the streamline cavity which is designed based on bionic structure and the tail rudder is mounted at the tail of the streamline cavity, tide resistance is reduced, and the bionic fish-shaped power generating set can regulate posture automatically along with flow direction of tides so that its blades keep facing the tides all the time.