The pubic symphysis is a maternal surgical disease with an incidence of 1:300 to 1:3,000. 4-6 mm of the pubic symphysis gap in normal people can be widened by 2-3 mm during pregnancy, and it is generally believed that the pubic symphysis gap will cause symptoms if it exceeds 10 mm. The widening of the pubic symphysis gap occurs as early as around 10 weeks of pregnancy and is detrimental to the health of the pregnant woman and the intrauterine development of the fetus. It leads to an increased rate of cesarean delivery. The condition worsens after delivery, with serious cases of urinary incontinence and maternal agitation and depression. Severe pubic bone separation, sacroiliac joint misalignment, ligament tear, resulting in the joint surface of the pubic bone can not be restored to its normal position. Medical advocates early diagnosis and early treatment. I. Diagnosis of pubic symphysis separation: There is no exact standard for the diagnosis of this disease. To sum up our hospital experience, its clinical manifestation triad: ① maternal prenatal or postnatal pain in the pubic symphysis area and lumbosacral region; ② difficulty in going up and down stairs, and in serious cases, difficulty in turning over in bed; ③ pelvic joints have strange sound when moving; physical examination: pressure pain at the pubic symphysis is obvious, positive pelvic squeeze – separation test, can be palpated the pubic symphysis gap widening; auxiliary examination: prenatal ultrasound or Postnatal DR and CT show that the pubic symphysis is separated and the width of the separated surface is more than 10 mm. Causes: Under the action of multiple factors such as hormone level during pregnancy, birth injury and postnatal bad position and sports injury, the ligaments around the sacroiliac joint and pubic symphysis are relaxed, which induces excessive separation of the pubic symphysis and sacroiliac joint subluxation, destruction of pelvic stability and lower limb motor dysfunction. Treatment plan: ① Manipulation reset under local anesthesia, pelvic sling fixation pelvis, continue until the symptoms disappear; ② Absolute bed rest for 1 week, no climbing ladders and slopes for 1 month, avoid weight bearing for 3 months; ③ Rehabilitation treatment: infrared physical therapy at the pubic symphysis or Chinese medicine fumigation; ④ If the pain is severe, local closure can be performed; IV. Assessment of efficacy: manual repositioning + pelvic fixation is a simple, safe, economic and reliable treatment method with immediate effect, which can rapidly relieve pain and greatly shorten the recovery time of patients.