The invention discloses a synthetic method of a triphenylene hexyl-alkoxy bridged isooctyl alkoxy phenyl porphyrin disc-like liquid-crystal binary compound material. A synthetic route of the material comprises steps as follows: step one, monohydroxy pentahexyloxy triphenylene is generated; then alkoxy triphenylene containing an omega-bromine branched chain is synthesized; step two, porphyrin acid is obtained; step three, intermediates obtained from the two steps are subjected to phase transfer catalytic reaction, and an alkoxy bridged porphyrin-triphenylene binary compound is synthesized. Triphenylene as a common material has the advantages that photochemical property and heat stability are good, raw materials are available, a product is easy to purify and the like, porphyrin has the advantages of strong absorption property and good photochemical property and heat stability in a visible light region, and the synthetic method is mature, so that the synthesized triphenylene hexyl-alkoxy bridged isooctyl alkoxy phenyl porphyrin disc-like liquid-crystal binary compound material can be applied to molecular devices such as an organic photovoltaic material, a liquid crystal material, an organic solar cell, an organic light emitting diode and the like.