·AIM:To observe the clinical effect of dacryagogic plastic operation by KTP laser in the past ten years.·METHODS:The eyes of patients were routinely disinfected,and the lacrimal puncta were dilated.Then the dacryagogic probe with core was used to locate dacryagogatresia.The probe was removed.The transmitting light fiber of KTP laser was inserted into the position of dacryagogatresia.Laser was emitted until dacryagogatresia was open and washout of the lacrimal passages with levofloxacin was performed every other day.·RESULTS:This method was used to treat various dacryagogatresia in 766 cases,870 eyes.There was no effect in 9 cases.The cure rate was 99.0%.42 cases were treated again,and the rate was 4.8%.825 eyes were opened only once,and the rate was 94.8%.36 cases 36 eyes had no effect after the second treatment.·CONCLUSION:The dacryagogic plastic operation by KTP laser is an effective method with high curative effect for treating dacryagogatresia.·