AIM:To summarize the complications and solutions of retrograde lacrimal dilated drainage tube implantation for the treatment of nasolacrimal duct obstruction and chronic dacryocystitis.METHODS:Totally 110 cases (113 eyes) diagnosed with nasolacrimal duct obstruction or chronic dacryocystitis were treated with retrograde lacrimal dilated drainage tube implantation. Complications from postoperation to removing the drainage tubes 4 months were observed.RESULTS:There were 26 eyes（23.0%）with difficulty in removing tubes, 5 eyes（4.4%）with drainage tube invisible in nasal cavity, 3 eyes（2.7%）with drainage tube exfoliated, 1 eye（5.9% of B tube）with lacrimal caruncle punctured, 7 eyes （6.2%）with lacrimal canaliculus stenosis, 5 eyes （4.4%）with lacrimal passage reflux.CONCLUSION:The retrograde lacrimal dilated drainage tube implantation is effective and safe for the treatment of nasolacrimal duct obstruction and chronic dacryocystitis. Only the physician operates seriously, carefully and softly, it will reduce many complications and improve the cure rate. 