BACKGROUND: Postpartum stress urinary incontinence (SUI) symptoms affect a patient's daily activities and quality of life and increase the negative emotions that they experience. At present, there is no research on the effect of fractional CO AIM: To investigate the effect of lattice CO METHODS: Using a retrospective study, data from 82 cases of mild to moderate postpartum SUI in Huzhou Maternal & Child Health Care Hospital from January to April 2024 were retrospectively collected. The cases were divided into groups according to the different treatment methods, namely Group S (41 cases, only receiving lattice CO RESULTS: There was no significant difference in the baseline data and the ICI-Q-SF, I-QOL, EPDS, and PSAS scores between the two groups before treatment. However, at the end of treatment, the ICI-Q-SF, I-QOL, EPDS, and PSAS scores between Groups L and S were significantly different. The overall effective rate of treatment in Group L was significantly higher than that in Group S. During the 3-month follow-up after treatment, it was found that the ICI-Q-SF, EPDS, and PSAS scores of Group L were still lower than those of Group S. In comparison, the I-QOL score and total effective rate of treatment were still higher in Group L than those in Group S, and this difference was significant. There was no significant difference in the adverse reactions between Group L and Group S. CONCLUSION: The combination of dot lattice CO