Abstract: To study the distribution of pressure,temperature and pollutant during the mine fire,the mathematical model of mine fire has been established by multiphase model and species transport model,SIMPLE algorithm is used to simulate the disaster situation when fire source is set before and after ramp shunt and in the connecting roadway.Simulation results show that the role of fire pressure produced after the disaster is in contrast with the role of air flow.The temperature,pressure and volume fraction of pollutants are significantly affected by the airflow.When the disaster occurred on the leeward of ramp connecting roadway,the influence range of disaster is greater than that of weather side,the middle connecting roadway has the greatest sphere of influence on working face.The scope of pollutants and temperature affected by the disaster is in the fire downwind side of the fire source.