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Orientation of reconstructed mandible includes that of stump mandible and bone graft,which plays an important role in the functional and cosmetic lower jaw reconstruction respectively.A total of six types of orientation techniques for the stump of mandibles wafer based inter-maxillary fixation(IMF),inter-maxillary rigid fixation(IRF),pre-bending reconstruction plate(PRP),external fixation device(EFD),CAD/CAM re-position guidance(RPG)and navigation and robotic surgery(NRS)were introduced,simultaneously PRP,pin guidance EFD,RPG and NRS techniques also employed for bone graft.So far,NRS technique was mainly used for accurate calibration of some orientation techniques,like RPG.Several issues affected the orientation of reconstructed mandible as reconstruction pattern(one-stage or two-stage),defect type(HCL classification),occlusion factor and soft tissue consideration.In secondary mandibular reconstruction,the orientation of lower jaw was a refractory issue.Building up a stable and good occlusion relationship and respecting the acquired condylar position of unaffected side were really important for functional consideration and long term stability of reconstructed jaw.So sometimes orthognathic surgery should be done with the jaw reconstruction simultaneously,like BSSO or subapical osteotomy etc.Basically orientation of bone graft should obey the principle of mid-line accordance,reasonable width,height and projection of lower face.In this report,literature review combined with clinical cases presentation and experience sharing of varied orientation techniques would be performed.