目的　对骨恶性纤维组织细胞瘤的X线及MRI表现进行了分析 ,研究其影像特点。方法　 11例病人均拍了X线片 ,其中 1例做MRI检查。结果　发现 10例病灶在长骨的干骺部或骨端 ,X线表现多呈溶骨性溶冰状、斑片状、不规则状骨质破坏 ,边界多不清 ,少有骨膜反应 ,MRI表现在T1WI像呈低及更低信号 ,T2 WI像瘤组织信号不均匀增高 ,与正常组织分界清晰。结论　X线平片出现溶骨性骨质破坏且无骨膜反应需考虑本病的可能 ,应尽早活检和手术治疗。 Objective To analyze the X-ray and MRI findings of malignant fibrous histiocytoma and to study its imaging features. Methods All 11 patients underwent X-ray films, of which 1 was MRI examination. The results showed that 10 cases of lesions in the long bone metaphyseal or end of the bone, the X-ray showed mostly osteolytic ice-like, patchy, irregular bone destruction, border more unclear, less periosteal reaction, MRI findings In T1WI images showed low and lower signals, T2WI tumor signal unevenly increased, with clear boundaries of normal tissue. Conclusion X-ray film osteolytic destruction of bone and non-periosteal reaction need to consider the possibility of this disease should biopsy and surgical treatment as soon as possible.