The composite materials was made using high-viscosity clay as carrier, activated carbon as adsorbent, and titanium dioxide as photocatalyst The effect of its photocatalytic degradaticn activity of Rhodamine B was studied. The results showed that the catalytic activity got the maximun at pH of the reaction solution 10, the composite dosage of 5g, calcination temperature of 550 degrees C, activated carbon: titanium dioxide as 0.75:1.