Multi-process 3D (three dimensional) printing method

The invention provides a multi-process 3D (three dimensional) printing method. A three-dimensional model is subjected to hierarchical processing to obtain the material composition and profile information of each layer of cross section; different printing mechanisms are selected according to different material composition information; in a powder distributing mechanism, a gradient material printing mechanism and a microdroplet ink jet printing head mechanism, different powder or liquid materials are respectively loaded into corresponding material boxes according to different printing regions and different printing materials, and the materials are evenly printed on the corresponding printing regions in sequence, so the integrated printing of mixed material objects of different kinds and structures is realized by adopting multiple materials and multiple technologies. The multi-process 3D printing method has the advantages that the limitation of the existing 3D printing that a single technology is adopted and only single-material homogeneous printing is realized is overcome; the printing of a complex structure is easily realized; and convenience is provided for printing a 3D object.