Based on the thermal analysis instruments and the AKTS simulation software,the thermal decomposition process of the fireworks and crackers are researched and studied,and the conclusion are gained as follows: the change curves of the activation energy and correlation coefficient with the progress of reaction are drawn. Moreover,the maximum environment temperature that the fireworks and crackers could completely react in 24 h( T24 h) and Self Accelerating Decomposition Temperature( SADT) are calculated. The r...