Obstetric broad ligament hematoma is one of the serious complications of obstetrics, which can occur during or after childbirth. The mass is asymptomatic when it is small and has no characteristic clinical manifestations when it is large. Hematoma is induced by the accumulation of blood clots in the surrounding tissues. If the hematoma is not large and the condition is not severe, it can usually be absorbed as long as the inflammation is actively controlled. If the condition is severe, surgical treatment is indicated. Inadequate suturing of the tissue at the incision end of the broad ligament hematoma is the cause of the hematoma. The edge of the incision must be sutured to more than 1 cm from the incision, and it is best to tie the knot separately. The suturing of the 2 corners of the uterine incision is critical. Immediately after delivery of the fetus, tissue forceps should be taken to clamp the two corners of the uterine incision and the upper and lower edges to avoid vascular retraction. The stitches are also used to prevent the blood vessels from retracting and forming a hematoma. There is also the possibility of a broad ligament hematoma due to the presence of a prolonged fracture of the uterine incision. The hematoma of the birth canal is related to the injury of the birth canal, and there are also hematomas related to blood coagulation dysfunction, which may be formed even if there is mild tissue damage during labor or surgery. For example, hematologic diseases, especially with thrombocytopenia, insufficient synthesis of coagulation factors in liver diseases, and severe hyperemesis complicated by DIC. Therefore, pregnant women with the above-mentioned comorbidities should be carefully checked and observed, regardless of the mode of delivery, to stop bleeding. How to prevent and treat the formation of hematoma in the broad ligament? If the hematoma is not large and does not tend to increase in size, anti-inflammatory, hemostatic and physical therapy can be strengthened in anticipation of hematoma absorption; if the hematoma is very large and obviously anemic or continues to increase in size, abdominal dissection should be performed, the broad ligament should be incised, the hematoma should be removed, sutures should be placed to stop bleeding or drainage tubes should be placed to drain the hematoma, and postoperative anti-inflammatory and hemostatic therapy should be performed. Regular checkups are still necessary, such as abdominal ultrasound monitoring.