Objective:To explore stability and stress distribution of the pelvic reconstruction using fibular transplantation combined with rod-scew system fixation after type Ⅰ resection.Methods:A finite-element model of the lumbar-sacral spine,proximal femur and pelvis was constructed.Three-dimensional finite element models of different implants including fibula,rod,and screw were constructed using ways of solid modeling.Then various reconstructed finite element models were assembled with different finite element implant model and type Ⅰ resected pelvic finite element model.500 N of force was applied vertically to the L3 vertebras upper surface,and the pelvis was fixed in bilateral leg standing positions.Finite-element analysis was performed to account for the stress distribution on the bones and implants.The pelvis displacement of the different rodscrew fixation methods and the maximum equivalent stress (max EQV) on all nodes and element were figured out to evaluate the advantages and disadvantages of different reconstructive methods.