Congenital nasolacrimal duct obstruction(CNLDO)is one of the most common ocular disorders in infants, and the main feature is a membranous obstruction of the distal end of the nasolacrimal duct. Methods are considered to treat with CNLDO, including lacrimal sac massage, probing, silicone intubation, balloon dacryocystoplasty, and dacryohynostomy. Recently, the combination use of lacrimal endoscopes may increase the success rate of surgery. Because many CNLDOs can resolve spontaneously, there are still some controversies in the timing of surgery and the choice of treatment options. The aim of the review is to provide a reference for the treatment of CNLDO.