A comminuted fracture of the pelvis is very serious for the following reasons: 1. The rupture of blood vessels at the fracture end after a comminuted fracture of the pelvis can lead to massive internal bleeding, which can cause shock in the body, a drop in blood pressure, a gradual decline in the function of the organs, failure, and possibly unstable and even life-threatening vital signs. 2. As the fracture end of the fracture may be inserted into the pelvis after a comminuted fracture of the pelvis The fracture end may insert into the pelvic organs, such as the bladder, uterus, and adnexa, which may cause a large amount of internal bleeding after the injury, leading to further increase of bleeding and more serious shock, which may directly endanger the life. 3. The prognosis is often poor.