Embodiments of the present disclosure provide a method and apparatus for executing program service logic, a device and a medium. The method includes: dividing a plurality of logic blocks included in a target program into a plurality of service logic block sets according to a service to which a logic block belongs; concatenating the plurality of the service logic block sets into a service logic chain which is used for executing respective service logic block set in sequence according to an order of the respective service logic block in the service logic chain. Through the method of the present disclosure, service processing logics of different services can be decoupled, which is convenient for distinguishing and maintaining the processing logics of different services and avoiding the mutual interference of the processing logics of different services during execution.