The present disclosure discloses a driving assembly. The driving assembly (10) is configured to be arranged on one end of a developing cartridge (100), the driving assembly (10) comprises a connector (2) configured to engage with a driving head (200) of an electrophotographic image forming apparatus. The connector (2) comprises a sleeve (3), a guide rod (22), and at least one engaging claw (21). The sleeve (3) has a protrusion portion (32) at its distal end relative to the developing cartridge (100), the protrusion portion (32) axially projects outwards and has a limiting groove (34) with an outwards opening; the engaging claw (21) is hinged at the second end of the guide rod (22); when the driving assembly (10) rotates upon receiving driving forces, a side surface of the limiting groove (34) contacts a side surface of the engaging claw (21). A developing cartridge (100) comprising the driving assembly is also provided.