The infrared gas sensor has the characteristics of fast response speed and high stability,but the detection accuracy is greatly affected by temperature changes.In this paper,experiments are performed on the gas response signal of the CH4-CO2 infrared sensor for mining at different temperatures,and the temperature compensation algorithm model of the sensor is studied to eliminate the influence of temperature on the sensor response signal.The results show:at an ambient temperature of 20 ℃,a good linear relationship exists between the response signal of the CH4-CO2 infrared sensor and the concentration of the gas to be measured.The higher the temperature is,the larger the response signal of the CH4-CO2 infrared sensor is.The correlation coefficients between the response signals of the CH4 infrared sensor and CO2 infrared sensor and the gas concentration to be measured are 0.9203 and 0.9099,respectively.The linear correlation between the response signal and the concentration of the gas to be measured is increased,and the mean square error and the average absolute error are reduced.The accuracy of CH4 infrared sensor is higher.Based on the random forest temperature compensation model,the influence of temperature on the monitoring of mine gas concentration can be reduced in the temperature range of 10~25 ℃.