Any surgery, no matter how big or small, carries more or less risk. Artificial total hip arthroplasty is relatively risk-free due to its mature technology, but that does not mean that there is no risk of complications and comorbidities. For example, the risk of infection, which refers to the multiplication and growth of bacteria in the hip joint to produce infection around the hip prosthesis, has been gradually reduced with the rational use of antibiotics, the advancement of aseptic conditions and aseptic operation in the operating room, and the advancement of consultation and treatment techniques, and can now be controlled to less than 1%. Then there are complications of deep vein thrombosis and pulmonary embolism in the lower extremity, which refers to the risk of postoperative intra-leg venous reflux problems forming thrombus and the dislodgement of the embolus can cause pulmonary embolism, but the incidence has been extremely low with the marketing of special prophylactic drugs such as rivaroxaban and the use of minimally invasive techniques and rapid rehabilitation techniques, which allow the lower extremity to obtain early rehabilitation for walking on the ground. In addition, with advances in prosthesis design, processing and manufacturing and technology, the risk of prosthesis loosening and sinking is becoming less and less. The development of minimally invasive techniques in the bikini approach has also led to a reduced risk of postoperative hip dislocation. In conclusion, artificial total hip arthroplasty yields an excellent risk-benefit ratio compared to the good results obtained postoperatively.