Giant cell-rich osteosarcoma is a rare osteosarcoma and easily regarded as giant cell tumor of bone by pathematology.Because two deseases have different therapies,misdiagnosis frequendy affect the operator to select suitable surgical procedures.We described the cage of a patient with giant cell-rich osteosarcoma,non vascularised fibular grafts were used as substitutes for repairing and reconstructing caput humeralis and shaft of humerus after resection for bone tumors on proximal humerus,part functions were remained after the operation.