Provided in embodiments of the present disclosure are a fan blade assembly and a fan apparatus. The fan blade assembly includes: a primary fan blade, where multiple first blades circumferentially provided are arranged on the primary fan blade; an auxiliary fan blade arranged coaxial and adjacent to the primary fan blade, where multiple second blades circumferentially provided are arranged on the auxiliary fan blade, an air inlet direction of the auxiliary fan blade is an axial direction, an air outlet direction of the auxiliary fan blade is a radial direction, and the first blades and the second blades have different torsion directions; and an motor arranged on one side of the auxiliary fan blade away from the primary fan blade, where the primary fan blade has a maximum outer diameter greater than an outer diameter of the auxiliary fan blade. According to the embodiment of the present disclosure.