To explore the clinical evaluation value of high-frequency ultrasonography for postpartum changes of rectus diastasis after electrical stimulation therapy. Methods 52 cases of puerperae with rectus abdominis interval ＞2.0 cm undergoing electrical stimulation therapy at 6-week postpartum in the hospital were enrolled as the treatment group from April 2020 to January 2022. Another 51 cases of puerperae with rectus abdominis interval ＞2.0 cm undergoing conservative treatment at 6-week postpartum matched for age, gestation and mode of delivery were selected as the control group during the same period. The high-frequency ultrasound was applied to examine rectus diastasis intervals 3 cm above the umbilicus, at umbilicus site and 3 cm below the umbilicus. And statistical analysis was conducted. Results After treatment, incidence rates of rectus abdominis 3 cm above the umbilicus and at umbilicus site in treatment group were lower than those in control group (59.62% vs78.43%, 2=4.257, P＜0.05; 59.62% vs 82.35%, 2=6.448, P＜0.05). In the rest state, rectus diastasis intervals 3 cm above the umbilicus and at umbilicus site in treatment group were (0.55±0.41) cm and (0.70±0.63) cm, lower than those in control group ［(0.37±0.16) cm, (0.39±0.17) cm］(t=2.924; t=3.482, P＜0.05). In flexion state, rectus diastasis intervals 3 cm above the umbilicus and at umbilicus site in treatment group were (0.40±0.33) and (0.51±0.50) cm, lower than those in control group ［(0.29±0.18) cm, (0.33±0.12) cm］ (t=2.094; t=2.504, P＜0.05). Conclusion High-frequency ultrasound can effectively display rectus diastasis and recovery in puerperae before and after electrical stimulation, which is conducive to clinical diagnosis and evaluation of curative effect