Abstract: It is usually required that the gas content determined on coal cores is delivered rapidly in the course of coal and coalbed methane(CBM) exploration.However,the existing method of CBM content determination is hard to meet the requirement.Based on the principle and methodology of CBM natural desorption,on the basis of the result of natural desorption,and under remaining the desorbed volume,gas composition and its content basically unchanged,the gas desorption rate is sped up reasonably and effectively by the use of continuous measuring and appropriately raising desorption temperature.Taking the determination analog between the rapid method and conventional natural desorption as a basis,the method of the rapid CBM content determination is built up.Comparatively,the application of rapid method will shorten the determining period to several days or even several hours,which is able to meet the demand for coal and CBM exploration.