The invention is suitable for the technical field of image processing, and provides a target contour extraction method and device, equipment and a storage medium. The method comprises the following steps of: respectively combining separate block-shaped areas and pipe-shaped structures in a to-be-processed image to obtain a block-shaped space and a pipe-shaped space; extracting edge regression lines of the block-shaped areas in the block-shaped space and central regression lines of the pipe-shaped structures in the pipe-shaped space; respectively combining the regression line-marked edge regression lines and central regression lines into an edge regression line set and a central regression line set; respectively deforming the regression lines in the edge regression line set and the centralregression line set through a curve deformation model until all the regression lines in the edge regression line set and the central regression line set satisfy a deformation ending condition; and respectively superposing the deformed regression lines in the edge regression line set and the central regression line set at corresponding positions of the to-be-processed image so as to draw contours of the block-shaped areas and pipe-shaped structures in the to-be-processed image. According to the method and device, the equipment and the storage medium, the target contour extraction effect and efficiency are improved.