The invention relates to a dicyclohexyl trifluoromethanesulfonateammonium salt and application thereof. The dicyclohexyl trifluoromethanesulfonateammonium salt is prepared from trifluoromethanesulfonate and dicyclohexylamine. The dicyclohexyl trifluoromethanesulfonate ammonium salt can be applied to catalyzing the condensation reaction of three components such as aldehydes, amide and phenol, the condensation reaction of the three components such as the aldehydes, the amide and the phenol takes the phenol, the aldehydes and the amine as raw materials and is completely finished in an organic solvent under the action of the dicyclohexyl trifluoromethanesulfonate ammonium salt, and the reaction solution is separated and purified to obtain the corresponding multi-component condensation product. The invention develops a novel trifluoromethanesulfonate ammonium salt, promotes the application of a new generation of acid organic catalyst in the multi-component reaction, and promotes the further development of the multi-component reaction.