Objective To explore the surgical diagnosis of pediatric empyema, treatment and surgical operation opportunity. Methods From July 2003 to March 2009, 55 cases were treated , and plcural effusion was punctured in 2 cases. Closed drainage of thoracic cavitythe was done under local anesthesia in rest cases. 21 case fully recovered and 32 cases were taken pleural decortication. One case was taken pleural decortication and thoracoplasty. Results There was no operative mortality. After follow - up of 3 to 24 months, there was no recurrence , no complications such as thoracic deformity. Conclusion Pediatric empyema need timely diagnosis and active conservative treatment. Once fluidify absorbed slowly and there was persistent tendency, operation need to be done as soon as possible. After pleural decortication, we can get satisfied therapeutic effect.