Mandible angle osteotomy navigation template preparation method

The invention discloses a mandible angle osteotomy navigation template preparation method, and the method comprises the steps: (1), building a virtual mandible three-dimensional model; (2), designing an osteotomy line; (3), marking an osteotomy initial body, registering the initial body, and obtaining a thickened registered body and a thickened osteotomy body; (4), carrying out the local Boolean addition of the thickened registered body and the thickened osteotomy body through employing the local Boolean operation, enabling the thickened registered body and the thickened osteotomy body to become an integrated navigation template, and carrying out the smoothening of the external surface; (5), obtaining a mandible angle osteotomy navigation template, and opening a 2.5mm*2.5mm window at a second molar position of the mandible angle osteotomy navigation template. The method provided by the invention is simple in preparation of the mandible angle osteotomy navigation template, and the template is provided with an effective registering part, wherein the registering part can accurately determine the position of the template.