Abstract: From the demand of gas concentration analysis, it was pointed out that it was necessary to correctly distinguish the production processes correspond to the gas concentration sequence in order to better achieve the secondary analysis of gas concentration data. Aiming at the issue that the current monitoring system could not directly obtain open stop data in driving roadway, the method was proposed that production processes of heading face would be identified automatically by testing the change law of gas concentration data sequence from monitoring system. The problems were discussed that production processes could be identified directly by real-time inspection gas concentration, the average concentration method of gas inspection was proposed to do homogenization treatment for raw data, and the correlation coefficient was used to judge the coincidence degree for the new series of gas concentrations and the original data. The method was established that the slope change of after-treatment gas concentration sequence was adopted to automatically identify different production process.