This is a national standard that stipulates the use of thermogravimetric analysis to determine the combustion characteristics of coal. It specifies in detail the definitions of terms, method principles, required reagents, instrumentation, specific test procedures, result calculation and presentation, as well as precision requirements when using this method. This method is applicable to the analysis of combustion characteristics for lignite, bituminous coal, and anthracite. The core instrument for implementing this standard is the thermogravimetric analyzer. This method involves continuously measuring and recording the mass change of a coal sample with temperature or time under programmed heating and specific atmospheres (such as air or oxygen), thereby obtaining thermogravimetric (TG) and derivative thermogravimetric (DTG) curves to analyze the ignition, combustion, and burnout characteristics of coal. This standard provides a unified and standardized testing basis for the scientific evaluation of the combustion performance of different coal types.