A method for manufacturing a surgical guide for a dental implant, the dental implant including a crown (c) and fixture, the method comprising: a first operation of obtaining an integrated scanned image, and obtaining a CT image through CT scanning of the upper and lower jaws; a second operation of obtaining a three-dimensional occlusion guide image by overlapping the obtained integrated scanned image with the obtained CT image using the reference markers as references and matching the images in a main matching process in a difference map from which an image matching degree between the images is output; and a third operation of setting a height of a crown (c) based on the three-dimensional occlusion guide image, and manufacturing a surgical guide including a fixing groove matched with an internal shape of the patient's mouth and a guide hole formed along an implanting position of a fixture corresponding to the set crown (c), characterized in that the first operation includes: obtaining a primarily scanned image through scanning of inner and outer surfaces of a denture which has a first image matching groove matched with a patient's tooth implanting portion and in which a plurality of reference markers are attached to an outside thereof, obtaining a secondarily scanned image through oral scanning of upper and lower jaws while the denture is installed, preliminarily matching the secondarily scanned image with the primarily scanned image, and obtaining said integrated scanned image considering a vertical dimension by reversing the first image matching groove on the primarily matched image to dimensionalize an image of the first image matching groove from the primarily scanned image. a first operation of obtaining an integrated scanned image, and obtaining a CT image through CT scanning of the upper and lower jaws; a second operation of obtaining a three-dimensional occlusion guide image by overlapping the obtained integrated scanned image with the obtained CT image using the reference markers as references and matching the images in a main matching process in a difference map from which an image matching degree between the images is output; and a third operation of setting a height of a crown (c) based on the three-dimensional occlusion guide image, and manufacturing a surgical guide including a fixing groove matched with an internal shape of the patient's mouth and a guide hole formed along an implanting position of a fixture corresponding to the set crown (c), characterized in that the first operation includes: obtaining a primarily scanned image through scanning of inner and outer surfaces of a denture which has a first image matching groove matched with a patient's tooth implanting portion and in which a plurality of reference markers are attached to an outside thereof, obtaining a secondarily scanned image through oral scanning of upper and lower jaws while the denture is installed, preliminarily matching the secondarily scanned image with the primarily scanned image, and obtaining said integrated scanned image considering a vertical dimension by reversing the first image matching groove on the primarily matched image to dimensionalize an image of the first image matching groove from the primarily scanned image. obtaining a primarily scanned image through scanning of inner and outer surfaces of a denture which has a first image matching groove matched with a patient's tooth implanting portion and in which a plurality of reference markers are attached to an outside thereof, obtaining a secondarily scanned image through oral scanning of upper and lower jaws while the denture is installed, preliminarily matching the secondarily scanned image with the primarily scanned image, and obtaining said integrated scanned image considering a vertical dimension by reversing the first image matching groove on the primarily matched image to dimensionalize an image of the first image matching groove from the primarily scanned image.