The invention provides a driving force transfer part and a toner cartridge. The driving force transfer part comprises a cylindrical extending gear base, wherein the peripheral wall of the gear base is provided with gears along the circumferential direction, and a concave circular groove is formed in the end part of the gear base along the axial direction; two driving force receiving blocks are arranged from the peripheral wall of the circular groove to inside, the two driving force receiving blocks are symmetrically arranged relative to the axis of the gear base, the radial end surfaces of the driving force receiving blocks are successively provided with first driving force receiving parts, arc-shaped limiting parts and second driving force receiving parts; the arc-shaped limiting parts are arranged between first driving parts and second driving parts, the second driving force receiving parts are more close to the axis of the bearing base than the first driving force receiving parts, and a toner cartridge is provided with the driving force transfer part. The different driving heads can be well matched with a driving wheel transfer part by virtue of the driving force transfer part provided by the invention, so that driving force transfer is realized, the driving force transfer part is simple in structure and good in compatibility, and can be conveniently used by end-users.