The invention relates to a coating device for an automotive casting, and mainly solves the technical problem that residual coating can exist on the periphery of a casting in the prior art. The coating device comprises a casting lifting mechanism, a casting rotating mechanism 3 and a conveying pipeline, wherein the conveying pipeline comprises a storage barrel, a feed power pump 7 arranged at an outlet of the storage barrel, a coating supply pipe connected with the feed power pump, a liquid supply nozzle communicated with the coating supply pipe and a rolling brush used in cooperation with the liquid supply nozzle; a coating tank is arranged in a corresponding position under the rolling brush. With adoption of the technical scheme, the problem is better solved, and the coating device can be used in a casting coating process.