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Objective To discuss the techniques of tumor resection, pelvic reconstruction and postoperative management by reviewing the patients with malignant pelvic tumors in recent years. Methods 76 patients with primary malignant pelvic tumors were treated operatively between July 1997 and July 2003. The series comprised 47 males and 29 females. 31 cases were diagnosed as chondrosarcoma, 15 as Ewing sarcoma, 7 as osteosarcoma, 3 as lymphoma, 3 as malignant fibrohistiocytoma (MFH), 1 as hemangiopericytoma, 2 as myeloma, 13 as giant cell tumor(GCT). According to Enneking's division, the most common region of the primary pelvic tumor involved was region Ⅱ (51 cases), followed by region Ⅰ (16 cases) and region Ⅲ (9 cases). 16 cases were reconstructed with threaded pins and cement after resection of the ilium. 9 patients had local resection of pubis and ischium. 21 patients had hemipelvectomy. Among 30 patients with periacetabular tumors, 8 were reconstructed with hemipelvic prosthesis, 7 with saddle prosthesis, 6 with replantation of cauterized tumor bone and total hip arthroplasty, 9 with cemented total hip replacement after curettage of lesion. Results After 16 months to 6 years follow-up, among the 21 patients with hemipelvectomy, 4 patients had local relapse because the sacrum invaded by the tumors. 7 of 25 patients with lesions in regionⅠ or region Ⅲ had local relapse postoperatively due to the marginal incision to the acetabula. Among the 21 patients who had tumor resection and reconstruction in region Ⅱ, 4 had local relapse, 3 of which reconstructed with cauterized hemipelvis. As for functional recovery, all of the 25 patients with lesions in region Ⅰand region Ⅲcould walk postoperatively without assistance of a cane. 21 patients with acetabular reconstruction after resection of lesions in region Ⅱ could sit and stand normally and walked with a cane, some of them even had normal gait. Conclusion The major principle of treatment for primary pelvic tumor is that en bloc resection, only then the functional reconstruction of pelvic ring can be considered. Operators should be acquainted with advantages and shortcomings of different reconstructive methods of acetabulum to prevent the complications.