A visible⁃light induced strategy for C-C bond cleavage, amination of cyclobutanols was reported. The key alkoxy radicals were generated by employing inexpensive cerium catalyst, though charge transfer under visible⁃light irradiation which would undergo a selective β⁃scission and trapped by DBAD to afford hexahydropyridazine derivatives effectively.This reaction combines visible light and inexpensive cerium salts to develop a general practical strategy for the selective carbon⁃carbon bond cleavage and functionalization of ketones. Under operationally simple conditions, cyclobutanone compounds can be successfully converted into universal chemical structural units. Provides a nitrogen⁃containing compound while enriching the carbon⁃carbon bond breaking conversion method.