Multi-service differentiation is the basis of differentiated performance guaranteeing and network security monitoring.Real-time service differentiation can be realized on the basis of the service peak rate.Differentiation methods for static and dynamic services are respectively proposed in accordance with the correlation among boundary value of the rate based on service and the link load rates

by which multi-services can be dynamically differentiated as real-time and non-real-time ones in the state of real-time links.The feasibility and simplicity of this method are verified on the basis of C++ programming simulation.