Abstract: Based on determining the outburst characteristic index statistics principles, combined with 523 outburst accident data in Guizhou, through systematic analysis of coal and gas outburst characteristics in Guizhou from the aspects of outburst type, strength, outburst depth and intensity variation, mathematical statistical analysis method was used to process outburst value under each factor, and principal component analysis was used to analyze the main factors that affect gas outburst, practices is the external factor induced coal and gas outburst.