Congenital melanocytic nevus （CMN） is a kind of inborn pigmented nevus and occurs in approximately 1% of newborns. CMN may be cosmetically disfigured, also has possibility to malignant transformation. The most appropriate treatment for CMN is surgical excision. However, for large area of CMN, surgical excision would cosmetically cause scar in sensitive areas or in inoperable locations which is unsatisfactory. The lasers that have been studied for the treatment of CMN include pigment-specific lasers （ruby, alexandrite, Nd：YAG）, as well as ablative laser treatment with C02 laser and Er：YAG. In this paper, the progress of laser treatment in CMN was reviewed.