As　a　unique　class　of　functional　materials,　perovskite　oxides　have　shown　great　opportunities　in　various　energy　storage　and　conversion　applications.　However,　their　performance　for　boosting　photocatalytic　CO2　reduction　is　seldom　reported.　Herein,　we　report　a　facile　synthesis　of　coralline-like　LaCoO3　perovskite　materials　and　their　use　as　highly　efficient　and　stable　cocatalysts　for　splitting　CO2　into　CO　with　visible　light.