Method for improving precision of face scanning image registration CT scanning image

The invention discloses a method for improving the precision of registration of a face scanning image and a CT scanning image, and belongs to the technical field of three-dimensional digital maxillofacial bone shaping, and the method specifically comprises the following steps: determining the range of a subject face scanning image obtained by face scanning equipment and the range of a subject head tissue structure scanning image obtained by CT; artificial marking mark points are set on the face of the subject, and double-effect radiography paste is applied for artificial marking, so that the subject is in a preset face state; acquiring a face scanning image; cT scanning data of a subject and a three-dimensional reconstruction image subjected to face rendering are obtained; and importing the face scanning image and the CT three-dimensional reconstruction image into preset registration software, and registering the results of the face scanning image and the CT three-dimensional reconstruction image in the prese