Additive manufacturing (AM) is an advanced manufacturing technology based on the principle of“ discrete stacking”, which drives the additive equipment to realize rapid manufacturing of parts through data pre-processing, slicing and path planning of the three-dimensional digital model, and generating the recognizable execution code of the additive system. AM has been widely used in aerospace, automobile, shipbuilding, medical, construction and other industries in recent years. Slicing and path planning are the core steps of data processing for 3D digital model of additive manufacturing, which determines the process variables, part shape accuracy and performance of the manufacturing process. Firstly, the research progress of slicing method based on various digital models such as CAD model, point cloud model, STL model, voxel model, etc. in additive manufacturing is reviewed, and comments were made on the generation accuracy of each model, the principle of slicing algorithm, and algorithm efficiency; Secondly, various slicing algorithms such as equal thickness, variable thickness, variable direction, and partition combinations for planar and nonplanar surfaces, as well as various path planning algorithms for planar single region, multi region, local features, and nonplanar surfaces are reviewed. The design points of slicing and path planning algorithms are analyzed and sorted out preliminary; Finally, the current research status of planar and nonplanar slicing and path planning in additive manufacturing digital models is summarized, and its development trends are prospected.