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Relates to magnet stacking jig, Top center +-shaped protrusions that are provided with a compartment, the compartment 4 +-shaped protrusion is ejected from the stack of laminated body has; laminated body has said movable front the front-rear direction are rotatably fitted to a front surface of rare earth magnet placed laminated body has on the front laminated space vacuum compartment front projection +-shaped pressing member; laminated body has said movable front the front-rear direction are rotatably fitted to a rear side of a rare earth magnet placed laminated both sides laminated body has rear space vacuum +-shaped compartment protrusions push back member; said laminated body has a left side movable in left and right directions are rotatably fitted to a front left and rear left stack space which overlies the rare earth magnet stack space laminated body has left surface +-shaped pressing member left the vacuum compartment projection; laminated body has said right-and-left direction to the right side of movable laminated body has are rotatably fitted to a front right and rear right side view +-shaped compartment a rare earth magnet placed laminated space stack space projection direction of the pressing member and a right; laminated body has through each pressing member detachably fastened, each transfer slide projection towards the compartment-shaped laminated body has + a pressurized screw; including through a technology 4 before the heating process is used rare earth magnet of rare earth magnet firmly pressing the heart and enhancing productivity can be overdimensioned.