Benzimidazo[2,1-a]isoquinolin-6(5H)-one moieties are one of the most important compounds exten-sively existed in many pharmaceutically active compounds and functional materials. It is of great scientific significance to develop a new efficient and green method for the synthesis of benzimidazo[2,1-a]isoquinolin-6(5H)-ones. In this paper, a visible-light promoted fluoresce-in-catalyzed oxidative coupling of N-methacryloyl-2-phenylbenzoimidazole with dioxolane has been successfully developed, which underwent radical addition/ cyclization to construct benzimid-azo[2,1-a]isoquinolin-6(5H)-one derivatives. Under the optimized reaction conditions, eleven ben-zimidazo[2,1-a]isoquinolin-6(5H)-ones were obtained in 48%-78% yields. Their structures were de-termined by 1HNMR and 13CNMR. This protocal has the advantages of mild condition, green and simplicity.