Abstract: Taking rubber powder of waste tire as the research object， the influence of its pyrolysis process and the heating rate on the pyrolysis characteristics was analyzed by the thermogravimetric method， and the influence rule of its temperature and catalyst on the distribution of pyrolysis products was studied by fixed bed reactor. The results showed that the pyrolysis process reacted violently when the temperature between 304 ℃ and 497 ℃. With the increase of the heating rate， the pyrolysis curve shifted to the high temperature region accompanied by thermal hysteresis. When the temperature reached 550 ℃， the pyrolysis process was basically completed. According to the reaction conditions， with 15%Fe2O3 added at 550 ℃， the pyrolysis gas yield reached the maximum of 19.4%. While with 10%NaOH added at 550 ℃， pyrolysis oil yield reached the maximum of 48.5%. When the pyrolysis temperature was 550 ℃ and 10%CaCl2 was added， the pyrolysis carbon yield reached the maximum of 51.4%. In addition， the addition of catalyst could effectively promote the formation of small molecular gas and reduce H2S content. CaO had the best desulfurization effect， and NaOH could significantly increase the content of H2 and CH4 in the gas.