Fan blade and wind wheel provided therewith

The invention provides a fan blade which is capable of improving the oil fume suction effect and the oil fume exhausting effect and reducing noise, and a wind wheel provided with the fan blade. The fan blade comprises an upper mounting foot, a lower mounting foot and a fan blade body; the inner side of the fan blade body is in a convex curve shape, and the outer side of the fan blade body is in a concave curve shape; the wind wheel comprises a ring-shaped upper ring, and a base provided with a ring-shaped lower ring; the wind wheel is characterized by further comprising a plurality of fan blades; the plurality of fan blades are evenly arranged between the ring-shaped upper ring and the ring-shaped lower ring by the upper mounting feet and the lower mounting feet; a negative pressure area is defined by the base and the fan blades; the inner sides of the fan blades are arranged towards the negative pressure area.