Abstract: Taking coal briquette samples from coal and gas outburst mines as the research object, using the self-research coal containing gas loading damage experiment system, we carry out experimental research on the characteristics of gas seepage for outburst coal briquette samples under the different loading rates and the condition of the constant pressure. The results show that when the confining pressure and gas pressure are fixed, the loading rate affects seepage characteristics of coal samples. We determine the loading rate of 50 N/s as experiment loading rate to research seepage flow characteristics of the outburst coal under different condition of constant pressure difference; under the condition that the difference of confining pressure and gas pressure is fixed, with the collaborative increase of confining pressure and gas pressure, the gas seepage velocity of outburst coal briquette sample shows the trend of decrease first and then increase. The difference of seepage velocity between the maximum and the minimum is the trend of increase first and then decrease, and the value of difference reaches the maximum at confining pressure of 1.5 MPa and gas pressure of 0.75 MPa.