Abstract: Production of bituminous coal has been taking a very large part in total production of coal in our country, thus, taking forecasting of bituminous coal spontaneous combustion as study project and taking concentration ratio of CO₂ and CO as indicator, judging criterions of bituminous coal spontaneous combustion were proposed through analyzing results of temperature programmed oxidation experiments which were carried out with bituminous coal sample collected from several mines. The study pointed it out that when concentration ratio value of CO₂ and CO was higher than 40, the temperature of bituminous coal was larger than 70 ℃; when the temperature was higher than 160 ℃, the ratio value was about 3; when the ratio varied from 3 to 40, the variation of temperature was from 70 ℃ to 160 ℃. According to experimental results, exponential function was chosen after optimization to establish forecasting model of bituminous under the condition of low temperatures, unified form of forecasting model was provided, as well as coefficients and intercepts which had large discreteness, the concrete values of them should be determined according to characteristics of coal samples, experimental conditions and so on.