Disclosed is a processing box which can be detachably mounted on an electronic imaging device and comprises a housing and a power receiving unit (200). The power receiving unit (200) is provided on one end of the housing, and the power receiving unit (200) comprises a meshing part (210) and an elastic member (250), wherein the meshing part (210) is meshed with a driving unit (900) in the electronic imaging device and receives a driving force; the elastic member (250) applies an elastic force to the meshing part (210); the end of the power receiving unit (200) further comprises a pressing member (220), and the pressing member (220) controls the meshing part (210) to extend and retract. The present invention solves the problem that when the power receiving unit of the existing processing box is tightly meshed with the driving unit of the electronic imaging device, the processing box cannot be smoothly taken out from the electronic imaging device.