Abstract: In order to provide theoretical and technical support for the prevention and control of spontaneous combustion of abandoned coal in the goaf of Xinglongzhuang Coal Mine, taking 10310 working face of the mine as the research object, the oxygen concentration and temperature in the goaf were monitored by the beam tube monitoring system, and numerical simulation work was carried out with FLUEN. The distribution law of the "three zones" of spontaneous combustion in the goaf of working face and the influence law of the separation wall of the inlet and return air on the distribution of the "three zones" of spontaneous combustion are obtained. The results show that the oxidation zone ranges from 12.95～37.2 m on the air inlet side and 2.15～19.45 m on the air return side when the separation wall is arranged with an interval of 20 m in the goaf of working face. When there is no separation wall, the oxidation zone range is 35～71 m on the intake side and 13～38 m on the return side. Setting isolation walls on both sides of air inlet and return roadway can effectively reduce air leakage in goaf and reduce the risk of spontaneous ignition.