Abstract: To choose the appropriate coal gas desorption model, desorption experiments are carried out with 4 typical coal samples in experimental mine. To choose a more appropriate model of coal gas desorption, the comparison among Langmuir single molecular adsorption theory, Freundlich theory and theory of weibull function is used to fit the experimental data. The results show that Langmuir single molecular adsorption model, Freundlich model and weibull function model are all suitable for the coal gas desorption. The fitting degree of the Langmuir single molecular adsorption model is greater than 0.99, and Freundlich model is less than 0.99; weibull function model is greater than 0.999, which is more suitable for describing coal gas desorption process. The accuracy of three models is different and choosing appropriate coal gas desorption model has guiding significance for the study of coal gas desorption.