The optical limiting effect of Methyl-red dye doped suspended carbon nanotube mixture on 532 nm lascr lighter is studied in experiment. The experiments were carried out with samples of different thickness radiated by laser with different repetition frequency, and the results are compared with the results got from pure suspended carbon nanotubes. The results showed that, if the suspended carbon nanotubes with 60% transmission is doped with some Methyl-red dye, its solubility can be improved and the input limiting threshold decreases from 250 μJ to 200 μJ. The clamped output energies for samples with 2 mm and 5 mm thickness decrease from 45 and 20μJ to 35 and 9 μJ, respectively.