Abstract: In order to improve the efficiency of coal and gas outburst prediction, shorten prediction time, based on the distribution of gas pressure, the mechanics model of gas flow was found. By the energy conservation law, the energy change of unit volume of gas flow from borehole gas source position to the hole position was analyzed. We proposed that the square value of layer-through borehole gas flow could be expressed as a quadratic polynomial form of coal seam gas pressure. According to the ten groups values of gas flow from boreholes and gas pressure which are measured in Gaoxin Mine, using MATLAB software, the value of gas flow as an indicator to predict coal and gas outburst was obtained, and that was used to predict for 1502 working face, results showed that this method was accurate and reliable.