Abstract: The paper analyzed ratio of each type of accidents to all accidents and average death toll of each accident of roof, gas, water, fire, transport, electromechanical, blast and others in death accidents of nation-wide coal mines during 2005-2010, and pointed out that death toll of transport accidents is the third to all types and the one of electromechanical accidents is the fifth, whose total ratio is 13.72% to death sum. It pointed out that electrical fire source is the most main fire source which detonates gas explosion and the ratio of fire accidents caused by electromechanical accidents is 80% to the sum of mine fire accidents in 2010, and got a collusion that enhancing prevention and treatment of electromechanical and transport accidents is urgent for containing gas explosion and mine fire accident. Finally, it indicated that it is urgent to prevent and treatment electromechanical and transport accidents to reduce gas explosion and fire accidents caused by electromechanical and transport accidents.