The invention discloses an acenaphtho-imidazolyl nitrogen heterocyclic carbene metal palladium complex catalyst, which is prepared by the following steps: 3-chloropyridine or pyridine is taken as an axial ligand, acenaphtho-imidazole salt is taken as a framework, and coordination is carried out on the 3-chloropyridine or pyridine and a metal ligand PdCl2 in the presence of potassium carbonate under the protection of nitrogen so as to obtain the acenaphtho-imidazole nitrogen heterocyclic carbene metal palladium complex catalyst. According to the acenaphtho-imidazole nitrogen heterocyclic carbene metal palladium complex, due to the introduction of the anthraquinone skeleton, the coordination of carbon 2 as atoms and metals is affected, the charge density of the metal center is increased, thesigma electron-donating capacity is enhanced, the oxidation addition reaction is facilitated, and the catalytic circulation is further promoted. The experimental results show that the selectivity ofthe carbonylation cyclization reaction is high (the selectivity is more than 99%) and the conversion rate is high (more than 85%) by using the acenaphtho-imidazole nitrogen heterocyclic carbene metalpalladium complex catalyst. In addition, the dosage of the catalyst is small, the reaction conditions are mild, the use of toxic phosphine ligands is avoided, and the method is safe and environment-friendly.