The main principle of non-surgical treatment is to reduce or avoid weight-bearing to facilitate the femoral head’s own repair and prevent femoral head collapse, which is suitable for Ficat stage I and II cases, but its effect is not good. Since the early 1980s, many scholars began to study the use of pulsed electromagnetic field therapy for the treatment of femoral head necrosis, but due to the lack of long-term follow-up data, its efficacy needs further research and observation. Russo et al. (2000) reported 45 cases of osteonecrosis of the femoral head (ARCO stage I-III) in patients aged 20-68 years old, who were treated with extracorporeal shockwave therapy and followed up 6 months later. Ludwig et al. (2001) treated 22 cases of ARCO stage I-III femoral head necrosis by extracorporeal shock wave, with a mean age of 54.9 years, and obtained satisfactory clinical results. 14 cases were cured at 1-year follow-up with stable efficacy as shown by MRI dynamic observation. The authors concluded that compared with surgical methods, shock wave treatment has the following advantages: (1) non-invasive; (2) no destruction of bone, which is conducive to future prosthesis replacement. The clinical value of the treatment needs to be assessed by long-term follow-up results and the selection of a suitable animal model for histological observation.