BACKGROUND:: The treatment of bone tumour around the acetabulum is a challenge of orthopedics, but the limb-sparing surgeries of bone tumour around the acetabulum become the main trend along with the development of the diagnosis techniques and the application of neoadjuvant chemotherapy and the establishment of the tumour excision principle. OBJECTIVE:: To analyze the treatment effect semi-pelvic prosthesis made in China on bone tumour around the acetabulum. METHODS:: From 2001 to 2010, 19 patients with bone tumour around the acetabulum were enrolled and six patients were cured by removing the tumour and assembling the semi-pelvic prosthesis made in China. All the patients were followed-up for 6-72 months (mean 50 months). RESULTS AND CONCLUSION:: According to Enneking criteria, four cases were rated as good, two cases as fair. There was a good effect of semi-pelvic prosthesis made in China on the treatment of bone tumour around the acetabulum when the indications of resection and reconstruction of pelvic tumour were selected strictly. : (Figure is included in full-text article.)