When the gold inlaid bronze chariot and harness ornaments were unearthed from Mao mausoleums, they were heavily covered by rust and it was hard to see their patterns. This conservation project was initiated in accordance with preservation principles and operational methods. Taking into account the current condition of preservation of these relics, chemicals were first applied to soften the surface, and then mechanical methods were used to get rid of rust. Subsequently water was used to deep - clean the objects, the relics were soaked in benzotriazole (ETA) solvent and finally organic polymers were applied on the surface for protection. The relics were preserved effectively and their historical, artistic and research values were restored. This conservation practice shows that all conservation work should be designed according to the unique conditions of each object in order to achieve the desired goal. The methods used and technique employed provide reference information for treatment of similar relics.