A surgical position calibration method for getting the augmented and mixed reality of a surgical instrument includes the following steps: placing a calibration plate under a C-ARM to take C-ARM images, with the calibration plate provided with geometric patterns； inputting the C-ARM images into a computer to make 2D image maps； finding the center point of each geometric pattern on the calibration plate； defining a first reference calibration point； finding the distance between the center point of each other geometric pattern and the first reference calibration point to set up a translation matrix formula to form a 3D space image map； placing a surgical instrument at any position above the calibration plate； using the translation matrix formula generating a spatial variation image for the displacement of the surgical instrument； and forming a new spatial variation image.
