After pelvic bone fracture, the patient’s leg can not be lifted, the following reasons are common: First, pelvic bone fracture, most of them are caused by serious violence, in addition to pelvic bone fracture, the surrounding soft tissue damage is also more serious, the patient’s pain symptoms are more serious, so it will limit the leg lifting movement. Secondly, after pelvic bone fracture, it may be combined with femoral nerve and sciatic nerve injury, so that the innervation of the lower limb disappears, and the leg muscles have secondary atrophy, which also leads to the inability to lift the leg. The above two reasons are the common causes of pelvic bone fracture and inability to lift the leg. If the leg cannot be lifted, the cause should be investigated in time and active treatment should be adopted in order to gradually restore the motor function of the leg.