As one of the earliest examples in the world of a large ancient shipwreck, the Quanzhou Bay Song Dynasty shipwreck has its own characteristics that complicate its protection. This shipwreck was successfully recovered and then dried naturally and slowly over four years. However, the neglected desalting procedure and the presence of a large number of iron nails used on the body in the early protection period has had highly destructive consequences. At present, the shipwreck hull has been under preservation for 40 years, and the overall structure is still quite stable, but it is difficult to thoroughly solve the problems caused by earlier protection efforts. It is difficult to achieve long-term stability under open environmental conditions. Therefore, based on the analysis of its current state of preservation, the environment of the hull by trying to inhibit or delay various physical ,chemical and biological forms of deterioration have been started to control. These conservation actions are the most efficient way to prevent the wood of the ship from deteriorating further and to extend the life of the hull.