The invention belongs to the technical field of silver ornament surface treatment, and particularly relates to a method for carrying out coating to improve stability of silver ornaments on the basis of an atomic layer deposition method. The method for carrying out coating to improve stability of the silver ornaments is based on the atomic layer deposition method, and trimethylaluminum and water are used as reaction sources for carrying out deposition coating of Al2O3 film on the surfaces of silver ornaments so that the silver ornaments can have high hardness and high chemical inertness, and the stability of the silver ornaments can be improved; through research on the interactive relationship among chromatic aberration, scratch resistance and discoloration resistance of the coated silver ornaments, the optimal thickness value of the coating is acquired so that the silver ornaments can have the optimal film transparency and the optimal scratch resistance and discoloration resistance, and the problem that a coating method in the prior art cannot meet the requirements on the gloss, the texture, the scratch resistance and the discoloration resistance of the silver ornaments at the sametime is solved.