The adsorption kinetic processes of methylene blue, crystal violet and methyl green from aqueous solution on activated sepiolite were studied, and the effects of concentration and temperature on adsorption were analyzed. FTIR measurement was performed on sepiolite and sepiolite_dyes. The results show that the concentration has greater influence on the adsorption behavior than the temperature. Due to its small molecular dimensions, methylene blue can migrate into the tunnels of sepiolite, while the more voluminous dyes such as crystal violet and methyl green are mainly adsorbed on the external surface of sepiolite. Monovalent organic cations can be adsorbed on the neutral sites of sepiolite and form neutral or monovalently charged complexes.