It is an critical issue to promote effective learning in simulation-based medical ed-ucation（SBME）. Feedback debriefing， identified as the cornerstone of simulation experience， plays an important role in learning facilitation. This article served as an introduction to feedback debriefing and covered a range of topics including a brief review of its origin， relevant theoretical foundation， structure and process of debriefing in the context of SBME and evaluation of its utility in clinical practice. According to the current status of domestic and overseas research， potent debriefing should be emphasized to improve the effectiveness of SBME and future performance of individual and group.