The national policy of “Double Reduction” puts forward new requirements for the implementation of after-school services in all regions. The quality of after-school service courses is a key factor affecting the quality of after-school services. Curriculum-based promotion of after-school services has brought new challenges to all regions and schools. Studies showed that the promulgation of national and local supporting documents provided policy basis and useful reference for curriculum-based promotion of after-school services. The educational administrations have been attaching more importance to the implementation principles，content models，organizing forms and guarantee terms of after-school services. Theoretical and practical research on after-school service courses is heating up，and the study on after-school service courses is becoming a new hot-spot in academic research. In future implementation，curriculum-based provision of after-school services shall be based on clarified nature and orientation of after-school services；the research on key issues of after-school service courses shall be strengthened based on student development；and curriculum-based implementation of after-school services shall be facilitated through coordinating the forces of all parties.