Abstract: For the problem that 3D printing adaptive layering techniques do not preserve the details of model features well, the 3D printing model details adaptive slice method (MDASM) is proposed. The thickness of the slice without model feature details is determined by the method that based on normal vector of triangular face slices adaptive slice method (NTASM) to determine. Firstly, the angle change threshold is set and compared with the angle change of the normal vectors of the adjacent height triangular face slices in the tangent plane, so as to discriminate the existence of vertical sharp corner features, and determine the thickness of the vertical sharp corner feature layering. Secondly, the area change threshold is set and compared with the area of the closed contour curve of the tangent plane to determine whether there is a parallel cusp feature and determine the layering thickness of the parallel cusp feature. Finally, the smallest value of the three layering thicknesses is taken as the layering thickness. Matlab simulation shows that the model molding accuracy of MDASM is improved by 24.2% compared with NTASM. Fused deposition modeling (FDM) test results show that the model molding efficiency of MDASM is reduced by 21.8% and the value of surface roughness is reduced by 14.57% compared with NTASM. The simulation and FDM test studies show that MDASM can better retain the model feature details under the premise of ensuring the model molding efficiency, and has better model molding accuracy and practicality.