Abstract: Based on the analysis of several typical occurrence and disaster relief process of small coal mine water inrush and small coal mine gas accident in Guizhou, this paper tries to find the real reasons and preventive measures of water inrush accident for small coal mine in GuiZhou, so the mines and the supervision departments can fully understand the reasons and mechanism of mine water inrush accident on the mine production process, which effectively prevents or avoids the mine water inrush accident.