The initial temperature and the maximum peak temperature of the exothermic decomposition reaction of grade two and three coal mine permissible emulsion explosives at different heating rates are tested by differential scanning calorimetry (DSC) . The kinetics parameters of the reaction for emulsion explosives are calculated by Kissinger′s method. With the help of these parameters,the rate constants of the reaction at 120 ℃,150 ℃,250 ℃ are obtained,indicating that with increasing the amount of KCl and NaCl in emulsion explosives,the thermal stability of emulsion explosives increases. Some potential danger in the process are analyzed and some problems on safety in the process of emulsion explosives are presented.