Objective To investigate the value of laparoscopic operation in the diagnosis and treatment of closed abdominal injury.Methods Forty-seven cases of closed abdominal trauma were diagnosed and treated under laparoscope from December 2003 to July 2006.Under general anaesthesia or epidural anesthesia,an incision about 1 cm was made below the umbilicus.Then artificial pneumoperitoneum was established through an open tunnel or the veress needle(according to patient's condition).The camera was inserted through a trocar to clarify the diagnosis.If a confirmative diagnosis was not obtained,one or two additional trocars were inserted for further exploration. When the diagnosis was identified,another two or three trocars were inserted according to the location of lesions and corresponding treatment was performed based on pathogenetic condition.Results All the 47 cases were confirmatively diagnosed under laparoscope,including 15 cases of hepatorrhexis,13 cases of splenic rupture,9 cases of small intestinal rupture,3 cases of mesenteric injury,2 cases of pancreatic injury,2 cases of retroperitoneal hematoma,and 3 cases of intraabdominal multiple organ injury.Laparoscopic treatment was completed in 28 cases,a conversion to open surgery was needed in 17 cases,and conservative treatment was given in 2 cases of retroperitoneal hematoma.No surgical related death or complications happened.Conclusions Laparoscopy can be used in closed abdominal trauma to achieve a high diagnostic accuracy and to give a timely,effective,and proper treatment.