In response to the current situation of regional medical and health hierarchical diagnosis and treatment services and the existing problems in the continuity of medical services, this article applies supply chain management methods, system collaboration theory, and service ecosystem concepts to treat medical consortia as an organic whole. Based on the quality and efficiency of disease management in the whole life cycle of patients with difficult, complex and severe diseases, a multi-level and multi-disciplinary medical service supply chain model of difficult, complex and severe disease medical consortium is constructed with four core elements: patient flow, service flow, technology flow and information flow. This article provides a certain reference for the implementation of regional hierarchical diagnosis and treatment and the formulation of relevant policies in China from the perspective of theoretical research.