The length of hospitalization for acute pancreatitis needs to be determined by the type of pancreatitis, ranging from 7 to 10 days for normal acute pancreatitis to weeks to months for severe pancreatitis. 1. Ordinary pancreatitis: acute edema type pancreatitis, acute edema type pancreatitis is often relatively mild symptoms, usually after strict fasting water, anti-inflammatory, rehydration, inhibit pancreatic enzyme secretion and other treatments, the gastrointestinal function can basically be restored. Therefore, hospitalization takes about 7 to 10 days. 2. Severe pancreatitis: acute hemorrhagic necrotizing pancreatitis, this type of pancreatitis can cause necrosis of the pancreas or peripancreatic tissues, systemic explosive inflammatory reaction, sepsis, systemic multi-organ failure and even death. Most patients may require surgical treatment such as abdominal drainage, longer periods of fasting and water intake, more difficult to treat, and hospitalization often ranging from weeks to months. The length of hospitalization for acute pancreatitis is also related to the patient’s comorbidity with underlying diseases, individual physical condition and so on. It is recommended to consult a medical professional who can provide reliable information based on the patient’s condition.