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The thermochemical characteristicsand kinetics of chicken dung were studied on thermogravimetric apparatus at different heating rates. It was showed that five steps were included in the pyrolysis process of chicken dung: losing water, pre-pyrolysis, main pyrolysis, second pyrolysis and carbonization. As heating rate increased, the most weight loss rate increased greatly, and the characteristic temperature became higher. With Malek method,，reaction model could be determined, which indicated that pyrolysis mechanism of chicken dung was random nucleation and later growth. As the activation energy and frequency factor were estimated by bringing into pyrolysis reaction, the results were similar with the consequence calculated by Ozawa method, which showed that activation energy E was 180.83 kJ/mol, frequency factor lgA was 14.27 s-1 and activation series n was 1/3. By conventional pyrolysis experiment and analyzing the solids product ratio at the certain temperature, the result was in accordance with the residual carbon from TG test, which proved that result from TG test was reliable. 