The invention discloses a preparation method of a porous ceramic plate produced by using a nano ink-jet 3D printing technology, and the method is characterized in that the method the following steps: establishing a three-dimensional digital model of the porous ceramic plate, meshing the three-dimensional digital model of the porous ceramic plate, topologically optimizing the three-dimensional digital model according to an analog result, and importing the model into a processing STL format 3d modeling editing repair tool to carry out support adding, protection layer adding, slicing processing, green body 3D printing, green body post-processing, degreasing and sintering on the model. According to the invention, splicing of a plurality of ceramic plates is realized, different wall thicknesses or different crystal lattice types exist on the same plate, the geometric structure shrinkage ratio is more controllable, degreasing and sintering of a formed green body are combined into one, the sintering efficiency is improved, large-batch post-treatment operation without intensive labor force is realized, and the production efficiency is improved.