Day surgery is an important diagnosis and treatment modality to promote hierarchical diagnosis and treatment and form a “surgery in hospital, recovery in community” diagnosis and treatment mode. At the same time, the promotion and implementation of hierarchical diagnosis and treatment provides institutional support and promotion for the perfection of day surgery management. Based on the experience from the Day Surgery Centre of General Hospital of Eastern Theater Command, this paper investigates the role of “gate-keepers” and recovery guidance in community and secondary hospitals in the perfection of day surgery in tertiary hospitals. Taking orthopedic day surgery as an example, which accounts for the largest proportion in day surgery in General Hospital of Eastern Theater Command, this paper aims to explore a feasible model of hierarchical diagnosis and treatment of day surgery, which specifies the responsibilities and works of hospitals at all levels.