Abstract: The No.10 coalbed is one of three main mineable coalbed of Taoyuan mine.The Archaean era limestone aquifer close to No.10 coalbed is the direct aquifer of it.The lie concealed carbonate cranny Karst water-bearing rock group which mainly are Ordovician distributing outer of the the Archaean era limestone aquifer are the powerful supply of that.It is very danger to the mine production.In the paper,a cusp catastrophic model of forecast of water-inrush from coal floor is established,and the possibility of water-inrush from coal floor of the 1026^-2、1041^-2,1031 workface of the No.10 coalbed in Taoyuan coal mine are forecasted.The results provide theoretical basis for the prevention of the water-inrush from coal floor in Taoyuan coal mine.