Abstract: Mine air temperature forecast is the foundation of underground roadway air state parameters. It provides the basis for the analysis of high temperature thermal disaster and the design of cooling system in mine. The air volume for a single tunnel air temperature prediction model is known. However, the air flow distribution can be effected by natural wind pressure, which is due to temperature difference in mine ventilation network. So the coupling relationship between the air temperature and air flow are determined. It also puts forward a forecasting method of air temperature based on an overall mine ventilation network solution. Through iterative calculation of air volume and air temperature, the prediction of them is achieved in a balanced equilibrium. The software is developed for calculating the temperature of airflow and humidity in the mine roadway based on an ObjectARX platform. Through the simulation of Zhaolou coal mine ventilation network calculation results and the measured value, the air temperature and the natural wind pressure are predicted accurately in the mine ventilation network. The measured and calculated data agree well, indicating that the forecasting method has better applicability.