Objective:By reviewing the imaging data of adult femoral head necrosis, analysing the stress distribution characteristics of the hip joint in daily life, and the characteristics of the blood supply of femoral head. Make a statistical analysis of the correlation between the femoral head necrosis area and the stress peak area, morever, the correlation of blood supply area, put forward the stress mechanism of femoral head necrosis. Emphasizes the importance of the stress factors in the process of the occurrenc...