Abstract: Manganese slag library in the process of the construction and operation of environmental safety problems to reclaim land, construction land and the surrounding farmers how contradictory prominent problems in the project construction phase to take steps to reduce the accident probability is the pursuit of the manganese industry enterprise, is also the purpose of this study. In this paper, through the historical review of the way to our country electrolytic manganese slag library construction review and analysis of the historical situation, analyze the electrolytic manganese residue problems arising from the construction, operation and reason; Based on several typical manganese slag library environmental safety accident case analysis, analyzed the manganese slag possible key to library construction. Then according to the characteristics of electrolytic manganese residue analysis of traditional storage difficulties, this paper puts forward the abandoned opencast mining pit solve traditional electrolytic manganese residue piling, need to be aware of the advantages of relevant matters, and manganese in zhongxin company subordinate days such as new materials co., LTD factory of electrolytic manganese metal manganese slag library (hereinafter referred to as the "library" days such as manganese slag) for the construction of the practice, explores the use mine abandoned open-air mining pit as tailings, open-air mining pit construction land converted into steps and measures of the tailings.