Abstract: Under the control of gas geological structure and mining technical conditions, the seven mines of Hebi mining area presented different characteristics of coal and gas outburst. According to the actual case of coal and gas outburst in each mine, the basic gas parameters and outburst prediction parameters of II-1 coal seam, combined with the characteristics of mining area and geological structure, based on the theory of force and energy, it used the composite effect hypothesis of gas outburst to study the features and causes of coal and gas outburst in Hebi mining area. It determined that coal and gas outburst in Hebi mining area was controlled by geological structure, and the geostress was the main controlling factor. On this basis, it used the measured gas parameters to predict that seam floor elevation -550 m in depth was the outburst danger zone in Hebi No.3 Coal Mine.