Hemiarthroplasty and total hip replacement are both surgeries to restore joint function, but there are some differences between the two, including different conditions, different surgical methods, and different surgical costs. 1. Different conditions: hemiarthroplasty is mainly for femoral neck fracture, stage 3-4 femoral head necrosis, combined with osteoarthritis, total hip replacement is needed. 2. Different surgical methods: hemiarthroplasty only needs to replace the femoral head, and the acetabulum can be completely retained; total hip replacement needs to replace the entire hip joint with a prosthesis. 3. Surgical costs are different: hemiarthroplasty only requires replacement of the femoral head, and total hip replacement requires replacement of the acetabulum, which is relatively expensive. The specific situation needs to be combined with the imaging examination and clinical symptoms, patient’s age, physical conditions and other comprehensive judgment, need to consult the doctor in time, under the guidance of the clinician for standardized treatment.