Abstract:〔Abstract〕 Objective To explore the value of serum pancreatic amylase (P-AMY) and tumor necrosis factor-α (TNF-α) levels in predicting the prognosis of acute necrotizing pancreatitis. Methods A total of 108 patients with acute necrotizing pancreatitis admitted to Zhongshan Hospital Affiliated to Xiamen University from February 2014 to October 2019 were selected as the observation group, and 108 healthy people who underwent physical examination during the same period were selected as the control group. The patients with acute necrotizing pancreatitis were followed up for 28 days, and were divided into the survival group (89 cases) and the death group (19 cases) according to the prognosis. The levels of serum P-AMY and TNF-α were compared between the two groups; the predictive value of serum P-AMY and TNF-α levels in predicting the prognosis of patients with acute necrotizing pancreatitis was evaluated using the receiver operating characteristic curve (ROC). Results The levels of serum P-AMY and TNF-α in the observation group were significantly higher than those of the control group (P < 0.05); the levels of serum P-AMY and TNF-α in the death group were significantly higher than those of the survival group (P < 0.05). ROC curve analysis results showed that P-AMY and TNF-α had high predictive value for the prognosis of patients with acute necrotizing pancreatitis, and the combined prediction value was higher than that of the two alone. Conclusion The levels of serum P-AMY and TNF-α in patients with acute necrotizing pancreatitis are obviously increased. Detection of serum P-AMY and TNF-α levels is helpful to determine the prognosis of patients with acute necrotizing pancreatitis.