The pelvic stress distribution diagram of the five models. A: model A, the maximum stress of the pelvic (56.51 Mpa) was located in the middle of reconstruction plate; B: model B, the maximum stress of the pelvic (18.297 Mpa) was located above the middle hole of the reconstruction plate; C: model C; D: model D; E: model E. The maximum stress of the pelvic (69.07 Mpa, 90.01 Mpa, 81.60 Mpa) was all located in the area of cannulated screw through the sacroiliac joint. Compared to plate, SI screw can withstand greater stress and reduce stress distribution in the pelvis.