The invention provides a driving assembly and a developing box. The driving assembly provided by the invention comprises a cylinder part and a connection part which are coaxially arranged, wherein an acting force device is arranged on each of the cylinder part and the connection part, the connection part comprises a sleeve and a guide rod which are coaxially arranged, a connection claw is arranged at an end part of the guide post, the maximum deflection angle of the connection claw, limited by the sleeve, relative to the axis of the guide post becomes large with the outward axial movement of the guide post, and the distance of the connection claw outwards protruding along the axial direction of the guide post becomes small. The driving assembly has the advantages of structural stability, and is simple and convenient to operate, the developing box is convenient to install and disassemble, and stable transfer of a driving force can be achieved.