Internal combustion engine cylinder coating device without central electrode

An internal combustion engine air cylinder coating device without a center electrode comprises a coating tank, a support and an oxidation power source, the coating tank is cylindrical and is a conductor, electrolyte is arranged in the coating tank, the support is round and is a conductor, a plurality of fixing seats are arranged on the support, and an internal combustion engine air cylinder to be treated is placed in the fixing seats. The internal combustion engine cylinder to be treated and the fixing base are both immersed in the electrolyte, and the plating pool and the support are electrically connected with the oxidation power source. Compared with an existing coating device, the internal combustion engine air cylinder coating device without the central electrode has the advantages that the central electrode and parts for fixing the central electrode are omitted, and the structure of the coating device is greatly simplified; during film coating, the air cylinders are placed in the fixing base, the tediou