The invention discloses a service function chain cross-domain arrangement method for end-to-end delay performance optimization. The method comprises the following steps: S1, an advanced arranger responds to a service request of a user or a network administrator, and describes the service request as a service map with a weight; S2, the advanced arranger divides the service map into a plurality of sub-service maps with weights and allocates the plurality of sub-service maps to corresponding sub-network domains; S3, a low-level arranger in the sub-network domain performs intra-domain arrangementmapping on the received sub-service map and sends an intra-domain arrangement mapping result to the advanced arranger; and S4, the advanced arranger receives the intra-domain arrangement mapping result and judges whether the sub-service map is successfully mapped, if so, the advanced arranger terminates the processing, or otherwise, the advanced arranger executes S2 again. According to the servicefunction chain cross-domain arrangement method provided by the invention, the abundant available resources of a cross-domain network are can be fully utilized to meet the resource requirements of thenetwork service, and meanwhile, the end-to-end delay of the network service in the cross-domain network is minimized, thereby effectively improving the service experience of terminal users.