The invention discloses a naphthoimidazopyridine compound and a preparation method thereof. According to the invention, 2-phenyl-pyrido[1,2-a]imidazole and diaryl acetylene are adopted as raw material; and with a catalysis/oxidation double C-H activation method, the naphthoimidazopyridine compound is successfully prepared. The synthesis method is simple, and yield is high. The compound provided by the invention has good solubility in different organic solvents, and is easy to purify. Because multi-substituted condensed ring compound is a type of important framework structure and is widely applied in the fields of organic semiconductor materials and luminescent materials, the compound and the method provided by the invention have great application value and social economic benefit. The compound and the method has certain potential to be widely applied in the field of organic materials.