Puncturing plan route correcting method and device

The invention relates to a puncturing plan route correcting method and device. The method comprises the steps that an initial entry point is determined on the epidermis of a puncturing area according to an initial plan route and set as a mark point; twice CT scanning is successively performed on the puncturing area to obtain an initial CT image and a second CT image; the initial plan route is marked on the initial CT image; position information of the mark point is acquired in the second CT image; the initial CT image and the second CT image are registered; the position of the mark point in a registered initial CT image is determined according to the position information of the mark point; a distance vector from the mark point to the initial plan route is acquired; translation transformation is performed on the initial plan route through the distance vector from the mark point to the initial plan route, the intersection point of a transformed route and the puncturing area epidermis is determined as an actual entry point, a target point is determined according to the actual entry point and the length of the initial plan route, and a corrected puncturing plan route is obtained.