Internal cyst drainage surgery is a treatment option for pancreatic pseudocysts. Surgical anastomosis between the pseudocyst and the gastrointestinal tract is the more common surgical procedure used today. The main methods of internal drainage are gastric anastomosis for pseudocysts and jejunostomy for pseudocysts. 1. Pseudocyst gastric anastomosis: this procedure has a higher position of the pseudocyst. It is suitable for close adhesion between the cyst and the posterior wall of the stomach, but due to the relatively high incidence of late complication of anastomotic hemorrhage, the use of this surgical procedure has been somewhat limited. 2. Jejunoileal anastomosis for pseudocyst: it is the most commonly used method at present. Although the position of pseudocyst expansion has a large variation, the anastomosis can be guaranteed to be tension-free due to the large mobility of the loss-of-function jejunal collaterals. The key points of the anastomosis in this procedure are that the loss-of-function intestinal collaterals should be at least 30 cm long to avoid reflux, and the anastomosis should be wide and low. For patients diagnosed with pancreatic pseudocysts, they should go to the relevant departments of regular hospitals as soon as possible and be treated under the guidance of specialized physicians, so as to avoid delays that may lead to adverse outcomes.