The invention discloses a synthesis method of a triphenylene decyl alkoxy bridged dodecyloxy phenyl porphyrin metal Ni complex. The synthetic route of the synthesis method comprises the three parts that 1, monohydroxy 5-hexyloxy triphenylene is generated, and then alkoxy triphenylene containing one omega-bromine branched-chain is synthesized; 2, porphyrin acid is obtained; 3, intermediates obtained in the above-mentioned two parts is subjected to a phase transfer catalytic reaction to synthesize an alkoxy bridged porphyrin-triphenylene binary compound which reacts with a metal salt to obtain a metal complex. Benzophenanthrene serves as a common material, due to the fact that benzophenanthrene has the advantages that the photochemical and thermal stability is good, the raw materials are easy to obtain, and the product is easy to purify, and metal porphyrin is high in absorption, good in photochemical and thermal stability and manure in synthesis method. The synthesized triphenylene decyl alkoxy bridged dodecyloxy phenyl porphyrin metal Ni complex can be applied to molecular devices such as organic photovoltaic materials, liquid crystal materials, organic solar cells and organic light emitting diodes.