Acute nonvariceal upper gastrointestinal bleeding (ANVUGIB) is one of the most common emergencies of the digestive system. With the continuous development of digestive endoscopy technology and widespread use of proton pump inhibitors, the morbidity and mortality of ANVUGIB have declined, but there are still numerous difficulties to be solved in clinical treatment. The International Consensus Group in 2019 updated the international consensus guideline in 2003 and 2010 with new clinical recommendations on fluid resuscitation, risk assessment, pre-endoscopic treatment, endoscopic treatment, drug therapy, and secondary prevention, etc. This paper interprets the update to provide references for the clinical treatment of ANVUGIB.