Air injection for enhanced oil recovery (EOR) is an important replacement technology for low permeability reservoirs. Most low permeability reservoirs undergo fracturing during development, so it is necessary to further study air injection to EOR in fractured low permeability reservoir. In this paper, crude oil oxidation experiment is used to simulate the change of regional crude oil oxidation temperature during air injection, and the temperature of injected air and crude oil oxidation is obtained. At the same time, the advancing velocity and advancing law of oxidation thermal front and gas front around formation fractures are simulated by numerical simulation. Based on the results of oxidation experiment and numerical simulation, the influence of underground fractures on the shape of underground temperature field and the temperature of oxidation front is obtained, the displacement characteristics of air injection development technology in fractured reservoirs are formed, and the stable underground oxidation reaction and stable advancing law are determined, In this paper, the displacement characteristics of air injection to EOR in fractured low permeability reservoir is confirmed, which lays a foundation for the popularization and field application of air injection EOR technology.