Abstract: The impact of coal and gas outburst are many factors,the key to accurately predict coal and gas outburst is select the appropriate sensitive indicator of outburst prediction.In this paper, use the grey theory to conduct the sensitivity analysis of coal and gas outburst forecast indicators,and with grey relevancy quantitative analysis the sensitive indicator of the Jiulishan coal and gas outburst prediction.The findings have important practical significance of coal and gas outburst prediction.