Abstract: Objective: To compare treatment effectiveness between modified preauricular and temporal-conjunctival-intraoral united incision and coronal-subciliary-intraoral united incision in treating orbital-maxillary-zygomatic(OMZ) complex fractures. Methods: 170 cases of OMZ complex fractures were divided into two groups. 88 cases in the control group were treated via coronal-subciliary-intraoral united incision,and 82 cases in the test group were treated via modified preauricular and temporal-conjunctival-intraoral united Incision. Both groups were reducted and fixed with titanium-plates. We compared the treatment results of two groups including the operation time, operative blood loss, the length of the incision, the degree of swelling and post-operative incision scar, wound effusion, facial nerve function, orbital nerve function, the sensory function of the preauricular and temporal region, the incidence rate of Lacrimal duct injury and the lower eyelid ectropion, the incidence of depression of the temporal region, the effect of rigid internal fixation, and the degree of patient satisfaction. Results: There were less time of operation, less loss of operative blood, shorter length of incision, less tissue reaction, less scar, less wound effusion, less incidence of facial nerve and the sensory dysfunction of the preauricular and temporal region, less incidence rate of Lacrimal duct injury, lower eyelid ectropion and depression of the temporal region, but more patient satisfaction in test group than those in control group (P＜0.05). There was no significant difference in the effect of rigid internal fixation and the incidence of orbital nerve dysfunction between two groups. Conclusion:The modified preauricular and temporal-conjunctival-intraoral united incision shows advantages of indistinguishable incison, slight injury and less complications.