The invention relates to a vertical double plate clamping unit and a method for making mixed die-casting components. The vertical double plate clamping unit (1) used for an injection moulding device comprises a fixed substrate (2), a plate (3) which can move relative to the substrate on a vertical direction, and at least a turn table (14) disposed between the substrate (2) and the movable plate (3), wherein at least a sliding workbench (13) is disposed between the substrate (2) and the turn table (14), so that the turn table (14) can be led in or led out from an area between the substrate (2) and the movable plate (3).