Abstract: Objective To explore the diagnostic value of four-dimensional pelvic floor ultrasound for postpartum female pelvic floor disorders and acupuncture treatment of postpartum female pelvic floor dysfunction. Methods Eighty prospective women with postpartum pelvic floor dysfunction and 80 women without pelvic floor dysfunction during the same period were selected to conduct a prospective study. They were set as observation group and control group, and two groups of women were subjected to four-dimensional pelvic floor ultrasound examination, Compare the levator anal fissure in the observation group with the control group. Patients in the observation group were divided into 2 groups of 40 cases each, and the four-dimensional pelvic floor ultrasound detection index, pelvic floor muscle strength score, and maximum vaginal systolic pressure in the two groups were compared. Results In the resting state and the anus contraction state, the anterior and posterior diameters, left and right diameters, and areas of the levator ani muscle in the observation group were larger than the control group, and the thickness of the levator ani muscle was smaller than the control group(all P<0.05). After treatment, the anterior levator rupture hole in the two groups was smaller than the observation group 1(all P<0.05), and the thickness of the levator ani muscle was larger than that in the observation group 1(both P<0.05). After treatment, the pelvic floor muscle strength score and the maximum vaginal systolic blood pressure in the observation group were higher than those in the observation group(both P<0.05). Conclusion Four-dimensional pelvic floor ultrasound can clearly and intuitively display the morphological characteristics of pelvic floor structure in female patients with pelvic floor dysfunction. It can also objectively evaluate the clinical effect of acupuncture in the treatment of pelvic floor dysfunction. Auxiliary diagnostic methods and efficacy evaluation methods for disorders.