Necrosis of bone surgery, in most cases, refers to surgery for necrosis of the femoral head. Conservative treatment of necrosis of the femoral head is not effective and arthroplasty is needed. After surgery, it is important to keep the surgical incision clean and dry, intensify dressing changes, and avoid getting wet to prevent infection. If the gauze comes off, it needs to be replaced immediately. This is because hip replacement surgery is a disastrous complication if the hip joint becomes infected. In addition, it is important to actively prevent deep vein thrombosis. Because the lower limbs are afraid to move after femoral head necrosis surgery, and also the trauma tends to lead to an increase in blood coagulation, which can easily lead to blood clots. Blood clots, if dislodged, can lead to pulmonary embolism and form fatal complications. At the same time, patients should also be instructed to carry out appropriate muscle functional exercises to prevent muscle atrophy. It is also necessary to prevent excessive hip flexion, internal retraction as well as internal rotation, as this poor posture can easily lead to dislocation of the hip joint.