The invention relates to a rotating force driving assembly suitable for a cartridge, an assembly method thereof and the cartridge. A rotation driving assembly comprises a photosensitive element gear, a rotation driving force receiving head and a power transferring pin, wherein the photosensitive element gear is installed on one end of a photosensitive element; the rotation driving force receiving head is arranged on the photosensitive element gear; the power transferring pin is used for transferring the rotation driving force received by the rotation driving force receiving head to the photosensitive element gear; and a sphere which is matched with the power transferring pin is arranged on the end of the rotation driving force receiving head, and a through groove is formed in the sphere. The rotating force driving assembly comprises an upper positioning piece and a lower positioning piece, the power transferring pin passes through the through groove of the sphere, and the power transferring pin and the sphere are relatively fixed between the upper positioning piece and the lower positioning piece in the axial direction of the photosensitive element gear, so that the driving force transferring assembly has a swing function in any direction at a certain angle, additionally, the assembly is simple, and the axial displacement and the radial displacement of the rotation driving force receiving head can be effectively controlled, so as to realize stable and reliable power transfer.