Background: Osteonecrosis of femoral head (ONFH) is a pathologic process characterized by the lacking vessel blood of femoral head leading to cellular death, fracture, and collapse of the articular surface. Currently, critical treatment for early stage ONFH is limited to core decompression. However, the efficacy of core decompression remains controversial. With the purpose to improve the core decompression efficacy, regenerative techniques like platelet-rich plasma (PRP) have been proposed to address early stage ONFH. PRP is defined as a sample of autologous blood with concentrations of platelets above baseline values, which have an important role in tissue repair, regeneration, and differentiation of mesenchymal stem cells (MSCs). Within this review, we will present a comprehensive overview of operation modes, mechanism and efficacy of PRP for early stage ONFH treatment. Methods: We searched Pubmed, Embase, Web of Science databases for relevant studies. Any observational or experimental studies that evaluated PRP, MSC, core decompression and ONFH were our goal of searching the electric database. Results: 17 studies that researched PRP and ONFH were identified in this review. We reviewed 10 studies related to the possible mechanism of PRP for treating ONFH. On the other hand, 7 studies were about to the operation modes of PRP in treating ONFH so far. We reviewed the efficacy of PRP in treating ONFH systematically, with an attempt to make a comparison of PRP operation modes of 7 studies and other operation modes of past studies in early stage ONFH treatment. Conclusion: PRP works to treat ONFH mainly through three mechanisms: induce angiogenesis and osteogenesis to accelerating bone healing; inhibit inflammatory reaction in necrosis lesion; prevents apoptosis induced by glucocorticoid. In addition, PRP are recommended as an adjunctive therapy for core decompression to improve the treatment of early stage ONFH patients, especially combined with stem cells and bone graft to induce an osteogenic activity and stimulate differentiation of stem cell in necrosis lesion.