Hemorrhagic necrotizing acute pancreatitis should be diagnosed when it has the following manifestations. ① Severe abdominal pain, abdominal muscle rigidity and peritoneal stimulation; (2) Shock, such as fidgety, cold limbs, spots on the skin, etc. ③ The serum calcium decreased significantly to below 2 mmol/L; ④ Diagnostic puncture of ascites with high abdominal amylase activity; ⑤ Blood and urine amylase suddenly decreased; 6 paralytic intestinal obstruction such as decreased bowel sounds and flatulence; @ grey.turner sign or Cullen sign; Iron albumin positive; (8) Fat necrosis of limbs and massive hemorrhage of digestive tract; Pet-name ruby hypoxemia; ⑩ White blood cells > 18× 109/L, blood urea nitrogen >: 14.3 mmol/L, blood sugar >; 1 1.2 mmol/L (no history of diabetes). Laboratory Center: Diagnosis of Acute Pancreatitis.