Abstract: Temperature-programmed experimental device is carried out to research the effect of high ground temperature environment on coal spontaneous combustion characteristics. Coal sample is oxidized in the constant temperature of 40 ℃, and then tested by temperature-programmed method. By comparing experiment process in normal temperature, the oxygen consumption rate, gas generation rate and exothermal intensity in the high temperature are higher than that in normal temperature. And the risk of spontaneous combustion increased.