Abstract:ObjectiveTo explore the superiority of circumcision with CO2 laser outside of Colles fascia.Methods 600 cases with phimosis and redundant prepuces that were admitted to hospital during 2006 and 2010 were treated by the method of CO2 laser demixing circumcision.Decoherence the skin of outer plate and inner plate with CO2 laser outside the loose connective tissue of Colles fascia.Observe the situation of the edema,wound recovery and function of the penile after operation.ResultsThe incision of all 600 patients were healing well.The patients recover rapidly and have aesthetic appearance.422 cases were followed up by 3 to 12 months.The patients were satisfied with the form and function of the penile.ConclusionWith the advantages of recovery rapidly,beautiful appearance,good function,CO2 laser demixing circumcision is a good method and worth to spread in the clinic.