Multi-element material composite molding 3D printing method and device

The invention discloses a multi-element material composite molding 3D printing method and device, a plurality of raw material bins including a crushed particle bin, a solid raw material bin, a slurry bin and a crushed powder bin are arranged, the ratio of various materials is controlled through a discharge port, and 3D printing raw materials are formed after uniform mixing in a mixing bin; according to the 3D printing device, the material type and the size range of the same 3D printing device are improved, multi-element materials such as metal, inorganic nonmetal, macromolecules and composite materials can be printed at the same time, materials in various shapes such as blocks, sheets, filaments, fibers and sheets can be used, waste printing works or supporting structures and the like can be used as raw materials, and recycling is achieved; and meanwhile, the furnace kiln assembled by the hot bed and the heat shield is wide in temperature range, and is matched with auxiliary equipment such as a vacuum pump an