Abstract: For the study of compound factors under the action of coal sample methane adsorption characteristics, we use the high pressure gas adsorption device for the influence experiment of temperature, particle size on coal sample methane adsorption characteristics, and use the Langmuir monolayer adsorption theory for fitting experimental data, the variance analysis method is applied to analyze the composite conditions of temperature, particle size effect on the characteristics of coal sample methane gas adsorption. The experimental results show that the temperature factors on the coal sample methane adsorption is bigger than the influence of factors on the particle size and the effect of particle size of coal sample has little effect on the adsorption of methane, temperature and particle size of coal sample methane adsorption performance has no interaction effect, the influence of temperature and particle size of coal sample methane adsorption was independent of each other.