The preoperative preparation of hip replacement patients includes the following aspects: 1. examination of the patient’s underlying disease and general condition: including the diagnosis and treatment of underlying diseases, examination and treatment correction of the patient’s blood pressure, heart and underlying diseases, such as diabetes and coronary heart disease, to pave the way for surgery; 2. local examination: including the examination of imaging data and local surgical design, that is, the selection of the patient’s disease The selection of the surgical approach, the selection of the surgical approach, the adjustment of the length of the patient’s limb according to the patient’s imaging data, the correspondence of the joint, and the preparation of the joint movement; 3. Patient psychological preparation: joint replacement is a major surgery, and patients are often not adequately prepared psychologically. If the patient does not pay attention to the disease, psychological preparation is also required at this time; 4. Preparation for local surgical trauma area.