Abstract:In the past two decades, with the deepening of the research on inflammatory bowel disease, biologics have become more and more important for the treatment of moderate to severe inflammatory bowel disease, but the failure of biologics to respond to the treatment of IBD still faces great challenges, and there are no clinical recommendations or guidelines for the treatment of such patients. This article reviews the response of various biological agents in the treatment of inflammatory bowel disease and understands the current research progress of biological agent response, so as to provide some reference for the clinical treatment of IBD.