If the fracture of neck of femur is already four months old, the patient needs to have professional general treatment, external fixation treatment and surgical treatment as soon as possible. 1. General treatment: patients need to take sufficient rest in daily life, and can follow the doctor’s instruction to carry out professional rehabilitation training after rest. 2. External fixation treatment: If the degree of displacement of femoral neck fracture is mild, external fixation treatment can be carried out with the help of professional doctors, such as traction and repositioning method or hip and knee flexion method. 3. Surgery: If the degree of femoral neck fracture is serious and the external fixation can not be reset, the patient can choose surgery, and the commonly used surgical solutions include closed reduction and internal fixation, artificial joint replacement, and incision reduction and internal fixation, etc. The patient is recommended to have a timely examination to determine the extent of the fracture. It is recommended that the patient should consult a doctor in time to clarify the cause of the disease and target treatment.