Abstract: In order to investigate the effect of underground complex environmental factors on the identification of forecast indicators for coal and gas outburst fatalness and meet the need of determining forecast indicators, the value of drilling cuttings weight and desorption index for drill cuttings were focused on, which were applied in coal and gas outburst controlling. The relation between desorption indexes for drill cuttings was discussed. After analyzing common factors which affect the error of single-index measurement, some attentions in mensuration and measures to reduce the error were put forward in preventing coal and gas outburst.