Elimination of encapsulated fluid in the pancreas after gastric cancer surgery needs to be combined with the patient’s symptoms. A small amount of fluid can be treated by medication. Drainage surgery can be chosen for large amount of effusion. 1. Drug treatment: if there is encapsulated effusion after gastric cancer surgery, the amount of effusion is small and the symptoms are mild, drug treatment can be considered. For example, growth inhibitor and omeprazole can promote the absorption of inflammatory exudate, and the use of drugs should follow the doctor’s instruction. 2. Drainage surgery: parcel fluid quantity is large purely by absorption effect is not excellent, can choose abdominal drainage surgery, through the intervention of the method will be drained out of the fluid. In the process of drainage, protein and ion should be supplemented to avoid ionic disorder. Encapsulated effusion in pancreas after gastric cancer surgery is generally not serious and can be improved through drug treatment, but there may be special cases, so once there is any abnormality, one should consult the doctor in time and standardize the treatment under the guidance of professional doctors, so as not to delay the condition.