The present invention provides a surgical device for osteotomy comprises a first body component and a second body component. The first body component has an upper guide edge for forming a cutting track. The second body component has a lower guide edge disposed below the upper guide edge. A guide groove is formed between the upper guide edge and the lower guide edge for guiding a saw blade to perform a cutting procedure. A hinge pin guide component is disposed on the surface of the second body component. The hinge pin guide component comprises a third correcting perforation extending to the rear of the guide groove. The third correcting perforation fits with a preoperative hinge axis for osteotomy as a hinge when a bone is opened. Compared to the prior art, the present invention can improve the efficiency and accuracy of the surgery.
