Optimization method of layering direction

The invention relates to the technical field of additive manufacturing, in particular to an optimization method of a layering direction. The optimization method comprises the steps that a three-dimensional model of a manufacturing object is obtained and converted into a processing model with triangular patches on the surface; the information of all the triangular patches in the processing model is provided, and a sample range of the layering direction is obtained; k proximal points of each sample of the layering direction are sought to form a proximal point set, and each sample of the layering direction is expressed through the corresponding proximal point set; a reconstruction optimization model is adopted for reconstructing each proximal point set, and a reconstruction parameter set corresponding to each proximal point set is determined; and multiple feature directions capable of best reflecting features of the layering direction are determined through optimization of each mapped sample of the layering dire