The invention relates to a processing box for an electronic imaging device, which comprises a powder storage, and the powder storage comprises a cavity which is used to store powdered carbon which can make images developing, a power-delivering roller which is used to deliver the powdered carbon, a powder-taking blade which can adjust the thinness of the powdered carbon and a developing roller, and the developing roller includes an inner layer metal steel shaft and an outer layer conductive rubber; the electronic imaging device can exert a developing bias voltage which is effected by AC and DC on the developing roller into the processing box. Due to adopting the developing roller as the developing device in the jumping developing way, the device can overcome the technique bias that the jumping developing way adopts the magnet roller as the developing device, thereby greatly reducing the preparing precision, difficulty and cost of the processing box of the electronic imaging device.