Yuejin Coal Mine protolith high temperatures, the use of computer simulation technology, combined with the actual production Yuejin Coal Mine, selected 23070 working face into the wind tunnel as the research object, the establishment of an appropriate model of geometric calculation temperature inside the mine tunnel, the inlet air the rate of change of temperature between the tunnel to get the temperature and changed mimics. Through these relationships mimic diagram of the qualitative and quantitative analysis, summed up in the actual production process, the temperature inlet air temperature with a specific relationship, mine production problems, provided reference and theoretical basis of technical measures.