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The danger degree evaluation of coal and gas outburst is mainly evaluating spot risk using the safety examination table and the evaluation value can be found. According to factors influence coal and gas outburst majorth were qualitative or fuzzy similar factors, used fuzzy gathering classification method for the coal and the gas outburst analysis, established fuzzy model, according to the model adopted the fuzzy similar selective principle proceeding evaluated. Two kinds methods join together analysis can raise on the accuracy rate of the prediction.