Abstract: Based on the analysis of the correlation between the measured value of gas content in the No.1 seam of a exploration area of Huainan and its corresponding log response value, the composite evaluation parameters are constructed, the mathematical model between the gas content and the composite parameters was established by using the regression analysis method, and the advance prediction of coal seam gas content in the exploration area was carried out, so that it is possible to find an abnormal target area for the actual measurement of the gas content. The results show that: the gas content of coal seam is highly correlated with the constructed parameters, and the correlation coefficient is 0.95; the accuracy of the gas content obtained by the mathematical model is high, which can provide reference for the evaluation of the gas content in the mining process of underground coal seam; at the same time, it provides a new and effective method for reusing coal mine logging data.