Objective: To evaluate the efficacy of mucosal flap punctoplasty in patients with chronic canaliculitis. Methods: In this retrospective serial case study, the clinical data of 44 patients with chronic canaliculitis were collected from the Oculoplastic Department of Zhongshan Ophthalmic Center at Sun Yat-sen University between January 2018 and December 2020. Demographic data such as gender, age, affected eye, clinical presentations and lacrimal duct irrigation results were analyzed. The efficacy of the procedure, symptom resolution and complications were assessed. Results: Of the 44 patients, most (male:female 1:3.9) were female, and the disease most often (upper:lower 1:3) involved the lower lacrimal canaliculus of only one eye. Main symptoms included increased secretion, tearing, and swelling of the inner canthus. Stones were present in 95.7% of patients and Actinomyces israelli was found to be the most common pathogen (78.3%). Most patients’ symptoms improved significantly within 1 week after surgery. Only one patient, who had infections in both the upper and lower canaliculi, had recurrence of upper canaliculitis 2 months after the surgery. The overall cure rate was 97.8%, and the follow-up time was (20.7±10.9) months. Conclusion: Mucosal flap punctoplasty is an efficacious and reliable method in the treatment of chronic canaliculitis.