Abstract: Electromagnetic radiation, gas desorption index of drilling cutting, drilling cuttings weight, initial velocity of borehole gas emission and the thickness of soft coal are selected as prediction index. Prediction model is set up by Fisher's discriminant of type-two to predict the risk of coal and gas outburst. Taking Jiulishan Coal Mine of Henan Energy and Chemical Industry Group as an example, the error rate is none in the risk area. And the accuracy rate is 80% in early warning. There is no missing, too.