ObjectiveTo summarize the clinical value of procalcitonin (PCT) in the prediction of early stage of acute pancreatitis, the evaluation of therapeutic effect, the evaluation of prognosis, and the use of antibiotics.MethodWe reviewed the related literatures about hematology indexes of severe acute pancreatitis and pancreatic infection and necrosis at home and abroad in recent years.ResultsPCT had high sensitivity and specificity in the diagnosis of severe acute pancreatitis and pancreatic infection and necrosis, and could be used as a tool to guide the early clinical treatment of severe acute pancreatitis. In the course of treatment, with the improvement of the condition, the value of PCT decreased. Monitoring the change of PCT value could evaluate the therapeutic effect of severe acute pancreatitis. Monitoring PCT during treatment could also guide the use of antibiotics.ConclusionPCT can be used as an early indicator for predicting severe acute pancreatitis and necrosis of pancreatic infection, as well as an indicator for guiding antibiotic treatment.