Clay minerals account for an important proportion of inorganic minerals in shale reservoirs, which are the important sites for shale gas adsorption. Due to the differences in forming condition of different shale reservoirs, the relative content of clay minerals is quite different, which also affects the adsorption capacity of shale gas. XRD, low-pressure nitrogen adsorption and methane isotherm adsorption were the main research methods. XRD results showed that the 4 samples (Ill, Mont, Chl, Kaol) were all of high purity greater than 94%. The results of low pressure nitrogen adsorption showed that the Mont was mainly composed of micropores and mesopores. The pore morphology was mainly parallel plate-like and slit-like openings in four sides with ink-like pores. The Ill and Kaol mainly develop mesopores and macropores; Chl mainly develops micropores and macropores and their pore morphology is all mainly parallel plate-like, slit-like, etc.. The order of specific surface area and pore volume is: Kaol > Ill > Mont > Chl. 5 groups of methane isotherm adsorption were performed at 61 °C under a pressure of 0-25 MPa, including 4 groups of pure clay minerals and 1 group of mixed minerals by 4 pure minerals in equal mass ratio. The order of methane adsorption of pure clay minerals is: Kaol > Ill > Mont > Chl. The larger the specific surface area of clay mineral, the larger the methane adsorption. It was founded by fitting the adsorption data to adsorption models that the fitting effects of Langmuir, Toth and Langmuir-Freundlich are generally excellent, which is of significance for the accurate selection of adsorption models of clay minerals.