Objective To investigate the efficacy of noninvasive matrix RF technology in promoting functional rehabilitation of the pelvic floor in postpartum women who have undergone natural delivery. Methods A prospective study was conducted on 80 nulliparous women who underwent spontaneous vaginal delivery at the hospital from January 2022 to April 2023. Participants were randomly allocated into a control group and an observation group， each comprising 40 individuals， using the random number table method. The control group received biofeedback electrical stimulation therapy， while the observation group was treated with non?invasive matrix radiofrequency （RF） technology. Both groups were assessed for pelvic floor muscle strength， pelvic floor structural parameters （levator hiatus area， levator muscle thickness）， and levator ani muscle ［measured by the maximum value of Young's modulus （E_max） in both resting and contracting states］ before treatment， after one session， and at the end of the treatment period. At the conclusion of the treatment， vaginal lubrication and vaginal sensitivity were evaluated using the Female Sexual Function Index （FSFI）. Additionally， the incidence of adverse events was compared between the two groups before and after the completion of treatment. Results After one treatment， there were no significant changes in pelvic floor muscle strength， levator ani muscle hiatus area， and levator ani muscle thickness in the control group compared to pre?treatment levels （P > 0.05）. In contrast， the observation group showed significant improvements in pelvic floor muscle strength and levator ani muscle thickness compared to pre?treatment levels， while the levator ani muscle hiatus area was significantly reduced （P < 0.05）. Additionally， at this point， the pelvic floor muscle strength and levator ani muscle thickness in the observation group were significantly higher than those in the control group， whereas the levator ani muscle hiatus area was significantly smaller （P < 0.05）. By the end of the treatment， both groups demonstrated further improvements in pelvic floor muscle strength and levator ani muscle thickness compared to pre?treatment and post?first?treatment levels， with a continued reduction in the levator ani muscle hiatus area. Notably， the observation group consistently exhibited superior outcomes in all three parameters compared to the control group （P < 0.05）. At the end of treatment， the E_max differences in the subpubic branch， abdominal muscles， and posterior hypothalamus were significantly greater than those before and after a single treatment session in both groups （P < 0.05）. Moreover， the E_max differences in these regions were significantly higher in the observation group compared to the control group （P < 0.05）. Post?treatment， both groups showed increased scores for vaginal lubrication， vaginal sensitivity， and FSFI， with more pronounced improvements observed in the observation group （P < 0.05）. Following treatment， no significant differences were noted between the two groups regarding the incidence of urinary incontinence， lumbosacral pain， uterine prolapse， and vaginal wall bulge （P > 0.05）. However， the observation group exhibited a lower frequency of adverse events compared to the control group （P < 0.05）. Additionally， maternal rehabilitation satisfaction was 100% （40/40） in the observation group， which was significantly higher than 85.00% （34/40） in the control group （P < 0.05）. Conclusions The application of noninvasive matrix RF technology in the rehabilitation of pelvic floor muscle function in postpartum women who have undergone vaginal delivery demonstrates rapid efficacy. It can enhance pelvic floor muscle strength within a short period， restore pelvic floor structure， and significantly improve vaginal lubrication and sensitivity， thereby enhancing sexual well?being.