The invention discloses an oil coating method and equipment for a cold rolled and galvanized wide automobile sheet. The equipment comprises a brush, a strip steel edge sweeping device, a thermal insulation material, an enclosed environment and a controller, wherein the brush is arranged beside trimming and shearing equipment; the strip steel edge sweeping device is arranged behind the trimming andshearing equipment; the thermal insulation material is used for coating the oil tank pipe of an oil coating machine body; the enclosed environment is arranged aiming at the oil tank; the controller comprises a storage and a processor; computer programs are stored in the storage; and when the programs are executed by the processor, the following steps are realized: controlling the brush arranged beside the trimming and shearing equipment to clean the surface of the galvanized strip steel after being subjected to trimming and shearing; controlling the strip steel edge sweeping device to sweep the upper surface and the lower surface of the galvanized strip steel after being subjected to trimming and cutting; controlling the knife beam of the oil coating machine body and utilizing the oil ina thermal insulation state in the oil tank to perform oil coating on the surface of the strip steel. According to the oil coating method and device for the cold rolled and galvanized wide automobile sheet, the technical problem that missing oil coating is caused when the cold rolled and galvanized wide automobile sheet is coated with oil is solved.