A method for synthesizing a 3-phenyl-2,8-dihydropyrano[2,3- f]chromene derivative, the method comprising: A) preparing a compound of Formula 3 by coupling a compound represented by Formula 1 with a compound represented by Formula 2; B) synthesizing a compound of Formula 4 by cyclizing the compound of Formula 3; C) preparing a compound of Formula 5 by reducing the compound of Formula 4; and D) preparing a compound of Formula by subjecting the compound of Formula 5 to a reductive elimination reaction: in the formulae, R 1 and R 2 are each independently a hydrogen atom; a substituted or unsubstituted straight or branched C 1 to C 6 alkyl group; a halogen atom; a substituted or unsubstituted straight or branched C 1 to C 6 alkoxy group; a substituted or unsubstituted straight or branched C 1 to C 4 thioalkyl group; a substituted or unsubstituted C 6 to C 12 aryl group; a substituted or unsubstituted allyloxy group; or a substituted or unsubstituted C 6 to C 12 aryloxy group; R 3 is a hydrogen atom, a C 1 to C 2 alkyl group, or a C 1 to C 2 alkoxy group; R 4 and R 5 are each independently a hydrogen atom or a C 1 to C 6 alkyl group; P means a protecting group, which is a substituted or unsubstituted benzyl group or allyl group; a tertbutyldimethylsilyl (TBDMS) group; a tertbutyldiphenylsilyl (TBDPS) group; a methylphenylsilyl group; a trimethylphenylsilyl group; methanesulfonyl (MeSO 2) or p-toluenesulfonyl (p-TsSO 2); or a trimethylphenylsulfonyl group; a dotted line is a selective double bond; n is an integer from 1 to 3; a plurality of OP's are the same as or different from each other; and in the case of the substituted alkyl group, the substituted alkoxy group, the substituted thioalkyl group, the substituted aryl group, the substituted allyloxy group, the substituted aryloxy group, the substituted benzyl group, and the substituted allyl group, the substituent is a halogen atom, a straight or branched C 1 to C 5 alkyl group, a straight or branched C 1 to C 5 alkoxy group, a straight or branched C 1 to C 3 thioalkyl group, or a nitro group. A) preparing a compound of Formula 3 by coupling a compound represented by Formula 1 with a compound represented by Formula 2; B) synthesizing a compound of Formula 4 by cyclizing the compound of Formula 3; C) preparing a compound of Formula 5 by reducing the compound of Formula 4; and D) preparing a compound of Formula by subjecting the compound of Formula 5 to a reductive elimination reaction: in the formulae, R 1 and R 2 are each independently a hydrogen atom; a substituted or unsubstituted straight or branched C 1 to C 6 alkyl group; a halogen atom; a substituted or unsubstituted straight or branched C 1 to C 6 alkoxy group; a substituted or unsubstituted straight or branched C 1 to C 4 thioalkyl group; a substituted or unsubstituted C 6 to C 12 aryl group; a substituted or unsubstituted allyloxy group; or a substituted or unsubstituted C 6 to C 12 aryloxy group; R 3 is a hydrogen atom, a C 1 to C 2 alkyl group, or a C 1 to C 2 alkoxy group; R 4 and R 5 are each independently a hydrogen atom or a C 1 to C 6 alkyl group; P means a protecting group, which is a substituted or unsubstituted benzyl group or allyl group; a tertbutyldimethylsilyl (TBDMS) group; a tertbutyldiphenylsilyl (TBDPS) group; a methylphenylsilyl group; a trimethylphenylsilyl group; methanesulfonyl (MeSO 2) or p-toluenesulfonyl (p-TsSO 2); or a trimethylphenylsulfonyl group; a dotted line is a selective double bond; n is an integer from 1 to 3; a plurality of OP's are the same as or different from each other; and in the case of the substituted alkyl group, the substituted alkoxy group, the substituted thioalkyl group, the substituted aryl group, the substituted allyloxy group, the substituted aryloxy group, the substituted benzyl group, and the substituted allyl group, the substituent is a halogen atom, a straight or branched C 1 to C 5 alkyl group, a straight or branched C 1 to C 5 alkoxy group, a straight or branched C 1 to C 3 thioalkyl group, or a nitro group. R 1 and R 2 are each independently a hydrogen atom; a substituted or unsubstituted straight or branched C 1 to C 6 alkyl group; a halogen atom; a substituted or unsubstituted straight or branched C 1 to C 6 alkoxy group; a substituted or unsubstituted straight or branched C 1 to C 4 thioalkyl group; a substituted or unsubstituted C 6 to C 12 aryl group; a substituted or unsubstituted allyloxy group; or a substituted or unsubstituted C 6 to C 12 aryloxy group; R 3 is a hydrogen atom, a C 1 to C 2 alkyl group, or a C 1 to C 2 alkoxy group; R 4 and R 5 are each independently a hydrogen atom or a C 1 to C 6 alkyl group; P means a protecting group, which is a substituted or unsubstituted benzyl group or allyl group; a tertbutyldimethylsilyl (TBDMS) group; a tertbutyldiphenylsilyl (TBDPS) group; a methylphenylsilyl group; a trimethylphenylsilyl group; methanesulfonyl (MeSO 2) or p-toluenesulfonyl (p-TsSO 2); or a trimethylphenylsulfonyl group; a dotted line is a selective double bond; n is an integer from 1 to 3; a plurality of OP's are the same as or different from each other; and in the case of the substituted alkyl group, the substituted alkoxy group, the substituted thioalkyl group, the substituted aryl group, the substituted allyloxy group, the substituted aryloxy group, the substituted benzyl group, and the substituted allyl group, the substituent is a halogen atom, a straight or branched C 1 to C 5 alkyl group, a straight or branched C 1 to C 5 alkoxy group, a straight or branched C 1 to C 3 thioalkyl group, or a nitro group.