Biliary stent is an effective method for treating malignant biliary obstruction. However, duodenobiliary reflux is commonly found after conventional biliary stent, which causes complications such as biliary retrograde infection and stent blockage, and seriously reduces the quality of patients’ life. At present, anti-reflux biliary stent is considered as a promising palliative treatment method taking drainage and preventing duodenobiliary reflux into account. In this paper, research status of anti-reflux biliary stent was reviewed, and key problems such as design and evaluation of anti-reflux valve, valve and stent connection design, biomechanical analysis of anti-reflux biliary stent were mainly summarized. The current research progress and trend of anti-reflux biliary stent were summarized and analyzed.