After the implementation of the "Double Reduction Policy", primary and secondary schools all over the country started after‐school service mode. After‐school services are a new concept for most schools, and schools are faced with many challenges to provide quality after‐school services. Based on this, this paper mainly describes the coupling between the "Double Reduction Policy" and after‐school service and the methods to improve after‐school service quality under the Double Reduction Policy, hoping to provide help for the improvement of after‐school service quality.