Abstract: Objective: To investigate the causes and methods of reoperation after cholecystectomy as well as its prevention.Methods: The causes and methods of reoperation in 9 patients underwent cholecystectomy were analyzed.Results: The main causes were residual cholelithiasis(6/9),hemorrhage in the abdominal cavity(1/9),choledochus injury(1/9),and bile leakage(1/9).Different reoperation methods were employed according to causes of complications.Nine patients were all recovered with good curative effect.Conclusions: A reasonable method is crucial to the treatment of cholecystectomy.Almost all reoperations can be prevented through preoperative evaluation and application of variety of methods in operation.