Archaeological timbers were desalinated and then stabilized and consolidated with polyethylene glycol (PEG) after being excavated from Kuahuqiao Sites. However, due to darkening after conservation, the archaeological timbers needed to be re-conserved. In the process of re-conservation, a solution of 1,2-dimethyl-3-hydroxy-4(1H)-pyridone was selected for desalting and decolorizing, PEG was used as a stabilizing and consolidating agent, and the vacuum freezing method was used for dehydration and drying. The re-conservation has achieved good results. The dimension and shape of the archaeological wood remain unchanged, the color is more natural, and the wood texture is clear and visible.