The invention discloses a pyrrolo-nitrogen bridge aromatic compound and a preparation method thereof. The compound is obtained by adding a pyridine compound II and ethyl acrylate or methyl acrylate into a solvent, then adding a catalyst and alkali, and performing a reaction in an oxygen atmosphere. Reaction raw materials and solvents involved in the preparation method disclosed by the invention are commercially available products and are low in price; the preparation method is simple, reaction conditions are mild (reaction can be performed at room temperature), the yield is good, the yield ofthe pyrrolo-nitrogen bridge aromatic compound product is 68%-87%, and the method has industrial application prospects.