It is well known that coal mine accidents occur frequently, and the gas explosion consequence is serious. There are a lot of reasons to cause the gas explosion. Using Management Oversight and Risk Tree to analyze the causes of coal mine gas explosion caused by the management of disasters and accidents, this paper establishes the MORT mode, in order to prevent accidents in coal mining disasters and provide a more economical and effective methods and new ideas for improving the safety management level. Results show that there is much correlation between the gas explosion and the emphasis of the leadership. Following methods, i.e. formulating rules and regulations, improving the whole members’ awareness of risk factors, improving the design of roadway, the gas concentration monitoring, and the design and the arrangement of ventilation system, and controlling combustion source, can effectively prevent the gas explosion accidents.