Double-layer fan blade assembly and fan comprising double-layer fan blade assembly

The invention relates to the technical field of household appliances, and provides a double-layer fan blade assembly and a fan comprising the double-layer fan blade assembly. The double-layer fan blade assembly comprises a first fan blade, a second fan blade, an inner gear, an outer gear, a fixed shaft gear and a driving piece, the first fan blade is fixedly connected with the outer wall of the inner gear, and the second fan blade is fixedly connected with the outer gear. The fixed shaft gear is located between the inner gear and the outer gear and is meshed with the inner gear and the outer gear simultaneously, and the power output end of the driving piece is connected with the second fan blade. According to the double-layer fan blade assembly provided by the present invention, under theaction of the driving piece, the second fan blade rotates, and with the help of the sequential rotation of the outer gear fixed with the second fan blade, the fixed shaft gear meshed with the outer gear and the outer gear mes