Abstract: In order to solve technical problem of low methane oxidization rate existed inthe available thermal accumulation oxidized device,a five bed type structure m ode of mine ventilation air methane thermal accumulation oxidized device was designed and the working principle of the device was stated.There was a blowing and purific ation process added in the traditional thermal accumulation and thermal releasing circulation of the device,the mine ventilation air methane residual volume in the device W ould be highly reduced and the methane oxidization rate would be improved over 98%. The paper introduced the design process of the oxidation chamber,combustion cham ber,airflow distribution chamber,preheating system and other parts as well as the general structure design plan of the device. The technology would have an industrial dem 0 in Chongqing Songzao Datong No.1 mine and the project is in a construction stage . After the completed industrial demo system put in operation,a superheated steam pro duction would be 64 800 t annually,the emission reduction of CO2 equivalent would107 000 t and an excellent energy saving and emission reduction benefits would be obta ined.