Abstract: Based on the research of the control mechanism of geology structure for the outburst and the distribution rule, the theory and method of tectonophisics were applied to the forecast of outburst. It was proposed that the outburst-prone tectonophisical environment is composed of 4 factors, that is tectonic combination characteristic, tectonic stress field, and tectonic coal and gas. The control mechanism of all factors of the outburst-prone tectonophisical environment was discussed. It was shown that the synthetic action of multi factors of the outburst-prone tectonophisical environment controls the outburst in the geology tectonic area, and this provides the theoretic basement for forecasting the outburst proneness due to the geology structure. Engineering practice proves that the outburst of coal and gas can be forecasted accurately with the analysis of the outburst-prone tectonophisical environment.