Abstract: Based on the mechanism of coal and gas outburst, this paper viewed from three factors that can induce outburst, discussed gas dynamic phenomenon caused by comprehensive tunneling machine cutting rock, and the factors are namely ground stress, external load disturbance and intrinsic gas energy. The results showed that even though the residual gas pressure of coal is no longer considered to have the kinetic energy that can cause outburst after regional comprehensive prevention measures, the coal which effected by ground pressure and external force, still can induced coal and gas outburst. This paper discussed the mechanism of deep mining and gas outburst, the critical value of outburst index, pointed out that we should pay more attention to the prevention of the inducing effect of comprehensive tunneling machine cutting rock, put forward some prevention and cure of coal and gas outburst accident under the similar conditions.