A Brϕnsted-Lewis acidic ionic liquid,[CH2COOHmim]FeCl3Br was synthesized.This ionic liquid exhibited high catalytic performance in the synthesis of 1-amidoalkyl-2-naphthols through one-pot three-component condensation reaction of 2-naphthol, aldehydes and acetamide at 100 ℃ under solvent-free conditions.The product confirmed by IR,1H-NMR and 13C-NMR spectra.The experimental results demonstrate that this method is environmentally friendly,simple,highly-yielding.Furthermore,the catalyst can be recycled and reused several times without obvious significant loss of activity.