To optimize the issue of long printing cycle which is in the way of the industrialization of paper-based 3D printing, a new fast and reliable coloration algorithm based on slicing strategies was proposed by using geometric information in STL files. The layer coloring surface is determined by D value that represented the positive or negative slope of layer in the 3D model after slicing, and colored with advanced inks to print single-sided instead of two-sided to accelerate the printing speed. According to the given 3D models, based on four slicing strategies including top-down slicing, bottom-up slicing, positive tolerance slicing and negative tolerance slicing, their coefficients of speedup scale were introduced and calculated; those Es values were all bigger than 0.5, and the Es value of negative tolerance method was the biggest. Therefore, this new algorithm based on existing materials and apparatus provided a lower-cost method to decrease the printing cycle of paper-based 3D color printing within the case of simple model.