Abstract: There are many kinds of reasons for the coal floor inrush water.Water inrush coefficient method,as a traditional method,considering very narrow range of influencing factors,and can not description the complex mechanism of the water inrush from coal floor.Based on the water inrush vulnerability theory,the text evaluated the water inrush risk of Cao village Ida 11^# coal seam and for the protection of coal mine production safety and play a role of safe production guideed for the coal in the future.