To perform safe and efficient protection of a badly corroded and fragile pig skeleton from Gongcun site in Pingyao，a low Concentration of B72 was chosen as a reinforcing and protective agent for in situ conservation.After treatment with B72,the entire skeleton was extracted form the site by block cutting and box lifting.The results showed that the method is reasonable and efficient.The successful extraction and protection of this relic represents valuable experience for similar conservation work in in-situ conservation and block lifting in the future.