The invention discloses axially-chiral indole-naphthalene compounds and a preparation method thereof. The axially-chiral indole-naphthalene compounds have a chemical structure represented by a formula9 shown in the description; and the method comprises the following steps: a compound represented by a formula 7 and a compound represented by a formula 8 are used as reaction raw materials, a mixed solution of 1,1,2,2-tetrachloroethane and p-xylene is used as a solvent, a molecular sieve is added, a reaction is performed under stirring under the action of a chiral phosphoric acid catalyst, the reaction is tracked by TLC until the reaction is completed, filtration is performed, concentration is performed, purification is performed, and therefore one compound is obtained. The method for preparing the axially-chiral indole-naphthalene compounds provided by the invention is an asymmetric addition reaction under catalysis of organic small molecules, starts from the racemic raw material to construct the axially-chiral indole-naphthalene structure in one step, and has the advantages of simple and convenient operation, mild reaction conditions and economical easily-available raw materials, and the prepared axially-chiral indole-naphthalene compounds have high optical purity; and the axially-chiral indole-naphthalene compounds prepared by the method are expected to be widely used in the field of asymmetric catalysis.