The utility model discloses a base plate is printed to repeatedly usable's 3D metal, this base plate are formed by two part combinations of daughter board and mother board, and the mother board is a tetragonal body box, and interior intracavity is equipped with 4 at least fixed columns, the mother board passes through fastening bolt and is connected with the workstation, the daughter board passes through the fixed screw and is connected with the fixed column in the mother board inner chamber, the mother board is made by carbon steel material, the size of daughter board, specification, material are printed requiredly according to the 3D metal and are decided. The utility model discloses not only can used repeatedly, still through changing different metals, not unidimensional daughter board on the mother board of printing the base plate at same kind of metal, realized a 3D metal and printed the base plate to different kind metal material's printing requirement, still solved metal product simultaneously and accomplished 3D and print that the back is quick from the base plate, the problem of convenient separation, reduce intensity of labour, improve production efficiency.