Abstract:The adsorption properties of macroporous resin DM-2 to the flavonoids were studied via static adsorption experiments. Adsorption dynamic was simulated by pseudo-first-order and pseudo-second-order models，making a conclusion that the latter was more suitable. Weber and Morris intra -particle diffusion modle proved that the control step was the internal diffusion procedure. Langmuir and Freundlich adsorption isotherm equations were used to study the thermodynamic characteristics and the langmuir adsorption isotherm equation was proved to be much better. The thermodynamic parameters calculated from Van 't Hoff equation，indicated that the adsorption process was a spontaneous exothermic procedure. The experiment results showed certain guiding significance to the further purification of buckwheat flavonoids.