The invention discloses a method of dehydrogenation self-coupling of a 1,3-dicarbonyl compound with visible light catalysis. The method comprises the following steps of (1) dissolving a photocatalyst,a peroxide and the 1,3-dicarbonyl compound into a solvent, and adding 1,4-dioxane to obtain a reaction solution; and (2) illuminating the reaction solution obtained in the step (1) with visible light, and performing separation after reaction is finished to obtain a 1,3-dicarbonyl compound dehydrogenation self-coupling product. By adopting the method provided by the invention, adopted visible light catalysis realizes coupling reaction of a dicarbonyl compound under the relatively mild conditions and responds current green chemical idea, and coupling of the dicarbonyl compound is finished witha more scientific and environment-friendly method.