Objective: To discuss the therapeutic effects of congenital nasolacrimal duct obstruction. Methods: A total of 630 children (827 eyes) with congenital nasolacrimal duct obstruction who were treated in Xianyang Rainbow Hospital and had follow-up records were selected. According to the age, the therapeutic effects were carried out in four ways. Results: A total of 230 cases (286 eyes) aged 0–2 months were treated by massaging lacrimal sac withantiinflammatory eye water, 182 eyes (63.63%) were healed; 240 cases (340 eyes) aged 2–6 months were treated by pressor clysis and lacrimal passages probing, and among them 338 eyes (96.74%) were healed. 150 cases (188 eyes) aged 6–12 months were treated with lacrimal passage irrigation and lacrimal passage probing. 188 eyes (89.74%) were cured; 10 cases (13 eyes) aged over 1 year old were tread by probing of the lacrimal passages with anti-inflammatory eye water, 10 eyes (76.92%) were healed. Conclusion: 2 to 6 months is the best time for the treatment of congenital nasolacrimal duct obstruction, the therapy of pressor clysis with lacrimal passages probing chosen according to the age can treat the congenital nasolacrimal duct obstruction efficiently and decrease the long-term recurrence