Objective:To carry out the clinical observation and research of OPT intense pulsed light combined parameters in the treatment of lip hairiness.Methods:A total of 94 female patients with lip hairiness who were treated with OPT intense pulsed light depilation were collected, of which 22 were treated with single parameter and 72 were treated with combined parameters, both once a month for 7 months. The treatment effects of the two groups were compared. From October 2013 to October 2019, the patients were collected from the Department of Medical Cosmetology, the Quzhou Affiliated Hospital of Wenzhou Medical University.Results:With the increase of treatment times, the curative effect of patients gradually appeared, and the χ 2 value was 10.87 in the single parameter group and 105.25 in the combined parameter group. The difference was statistically significant ( P<0.05). There was no statistical significance in the single parameter array between the two comparisons of different treatment times; there was statistical significance in the combined parameter group. The χ 2 value of treatment (1 vs. 3) times was 26.05, (1 vs. 7) times was 73.3, (3 vs. 7) times was 23.82 ( P<0.017). There was significant difference in the constituent ratio and total effective rate between the two groups after 3 and 7 times of treatment. The total effective rate of 3 times of treatment was 36.36% in single parameter group and 70.83% in combined parameter group; The total effective rate of 7 times of treatment was 59.09% in the single parameter group and 81.94% in the combined parameter group ( P<0.05). Conclusions:Combined parameters OPT intense pulsed light therapy has better effect on lip hairiness than single parameter, and the treatment is safe and has good clinical application value.