Abstract: Spontaneous combustion tendency is one of the major influence factors for coal spontaneous combustion.Based on the analysis of appraisal methods of coal spontaneous combustion tendency, the disadvantages of actual appraisal method of coal spontaneous combustion tendency in China are pointed out.According to the coal- oxygen complex theory of coal spontaneous combustion mechanism, taking oxygen absorptivity, exothermic intensity and activation energy during coal combustion process as influencing factors for appraising coal spontaneous combustion tendency, fuzzy comprehensive evaluation method was developed.On this condition, five coal samples parameters under the same conditions were tested by thermogravimetry analysis method, and fuzzy comprehensive evaluation model was established.Then synthetic indexes of spontaneous combustion tendency for five coal samples were obtained by fuzzy calculation.Through test, this method is of better practicability, and the evaluation results are of complete consistency with the tendency of actual coal spontaneous combustion.