Abstract: With the continuous growth in China’s electricity demand, power plants face significant challenges in enhancing resource utilization efficiency and reducing pollutant emissions. Although the Zhundong region of Xinjiang possesses abundant coal reserves, the carbon dioxide produced from coal combustion impedes the achievement of carbon peaking and carbon neutrality goals. Biomass and waste tires have emerged as potential alternative fuels due to their renewability, high calorific value, and low pollutant emissions. However, existing ignition and combustion studies suffer from low heating rates, making it difficult to accurately simulate the rapid temperature rise conditions within boilers. Isothermal thermogravimetric analysis is employed, with a vertical furnace utilized to simulate the ignition and combustion behaviors of Zhundong coal, biomass, and waste tire particles at temperatures of 700, 800, and 900 ℃, while collectingdata using an industrial CCD camera and an electronic balance. The particles were heated using isothermal thermogravimetric analysis, and their combustion stages were monitored. The study examined ignition delay time ( t_\mathrmi ), volatile matter burnout time ( t_\mathrmv ), and char burnout time ( t_\mathrmc ), and utilized the two-color method to obtain the maximum temperatures of volatile matter and char flames ( Tv_\mathrmmax and Tc_\mathrmmax ) within the combustion flame. The results indicate that biomass particles exhibit homogeneous ignition. Among the Zhundong coals, only Da Nan Hu Coal (DNH), which has a high volatile matter content, exhibited homogeneous ignition. At T = 700 ℃, agricultural biomass corn straw (CS) achieved the highest Tv_\mathrmmax of 1263.8 ℃. At T=800 and 900 ℃, woody biomass fruit wood (FW) attained the highest Tv_\mathrmmax , measuring 1293.3 and 1340.8 ℃, respectively. At T=700, 800, and 900 ℃, Xi Hei Shan Coal (XHS) reached the highest Tc_\mathrmmax values of 982.4, 1090.4, and 1195.85 ℃, respectively; Tv_\mathrmmax and t_v were not directly related to the volatile matter content per unit volume of the particles. The research provides valuable insights into the combustion characteristics of Zhundong coal, biomass, and waste tire particles, aiding in the development of fuel blending and combustion optimization strategies to enhance energy utilization efficiency and reduce emissions, thereby promoting sustainable energy practices.