Abstract: In order to effectively control the spontaneous combustion problem of spontaneous combustion, the influencing factors of static oxygen absorption in coal seams were studied. Study the influence of granularity, temperature and porosity development on the static oxygen uptake by The ZRJ-1 coal spontaneous combustion propensity measuring instrument. Experimental results show that: the static oxygen uptake of coal increases first with the increase of granularity, and the particle size is 35-60 mesh to reach the maximum oxygen uptake, and then decrease; the static oxygen uptake increases first and then decreases with increasing temperature, and the maximum at 100 °C; the macropores and mesopores are the main components of coal pore volume, and the specific surface area of pores accounts for about 10%, which has little effect on oxygen uptake during warming and oxidation; the ratio of the specific surface area of the transition pores and the micropores is 75% and 15%, which has a great influence on the oxygen uptake.