Abstract: To get gas outburst estimation method about Jiaozuo Mining Area, we study gas desorption laws of outburst coal under different degree of damage, particle coal sizes; the influence mechanism of various factors on gas desorption laws was studied; we used several empirical formulas to carry on regression analysis of experimental data, and obtained the best formula to describe the gas desorption laws in all stages, and then got the piecewise function expressions of gas desorption laws. We get statistical data regression analysis to grasp statistical laws between outburst coal amount and gas content. So as to study the laws of outburst shock waves and gas reverse flow, we provide basic parameters for the resulting dynamic change laws of mine airflow in disasters.