Iron sulfide could deposit in the marine archaeological wood during burial. After excavation, iron sulfide could react with oxygen and moisture to produce sulfuric acid and sulfates, and result in the degradation of organic matters. In recent years, increasing attention has been paid on iron sulfide in the conservation of marine archaeological wood. In this paper, research on this problem has been reviewed. The results on the origin of iron sulfide, the damage to marine archaeological wood, and the control methods have been summarized. Effectiveness of the control methods has been reviewed.