Carbonization reactions were studied experimentally in thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC), and the reaction kinetics obtained by serveral analysis methods were compared. The sample coals were U.S.A. Clintwood (CW), Australia Goonyella (GY), and China Tianchen (TH) bituminous coal. About 10-15 mg samples were nonisothermally heated from 30 ℃ to 950 ℃ in the flow of 100 mL/min He gas with various heating rates such as 1 ℃/min, 3 ℃/min, 5 ℃/min, and 10 ℃/min. TGA data were analyzed by using the differential methods of Kissinger, Freeman-Carroll, and Chatterjee-Conrad method, and integral method. DSC data were also analyzed by using the Borchardt-Daniel method. The Chatterjee-Conrad method was the most effective method for the analysis of TGA carbonization data in these experimental conditions. Activation energies of carbonization reaction were calculated as 61.2-65.9 kJ/g-mol, and the reaction orders were 0.92-1.29. For the DSC data, the activation energies of carbonization reaction by using the Borchardt-Daniel method were 39.5-56.0 kJ/g-mol, and the reaction orders were 0.98-1.05. The carbonization heat requirement from a room temperature to 1,000 ℃ were 828 J/g(CWcoal), 823 J/g(GY coal), and 1,077 J/g(TH coal).