Multi-resolution photocuring 3D printing system and edge optimization printing method

The invention discloses a multi-resolution photocuring 3D printing system and an edge optimization printing method, a three-dimensional model is preliminarily divided into H/h layers, H is the height of the three-dimensional model, h is the printing height of each layer, and the contour of the current layer is determined; selecting a next layer contour of the current layer, and performing difference set operation on the current layer and the next layer contour to obtain a positive region result, a zero region result and a negative region result; marking results of the positive region and the negative region, and accumulating the results into an edge structure of the three-dimensional model; a plurality of entities are obtained and marked as high-resolution printing areas; when the high-resolution printing area is manually designated, an entity or a surface is manually selected and marked as the high-resolution printing area; when the high-resolution printing area is not specified, marking a difference set of