The normal degree of anterior femoral neck inclination is about 12-15°, and the degree of feminine anterior inclination is greater than that of masculine anterior inclination. It is the angle between the axis of the femoral path and the frontal surface of the body. The clinical significance of the anterior femoral neck inclination angle is mostly reflected in orthopedic surgery. For the common femoral neck fractures and intertrochanteric fractures, if closed reduction intramedullary nail fixation is to be adopted, most of the femoral neck anteversion angle and neck stem angle need to be mastered to ensure the accuracy of closed reduction and internal fixation through the needle. In addition, during the operation of hip replacement, the normal anteversion angle must be maintained.