The invention relates to the technical field of magnetic material forming, in particular to an isostatic pressing packing method and device used after magnetic materials are formed. The method comprises a magnetic field pressing process and an isostatic pressing process. When the pressing process is finished, a lower die and a workpiece are taken out together, then a lower rubber die is placed on the lower die and turned over together with the lower die, after turning-over is carried out, the lower die is taken away, and finally, an upper rubber die covers the lower rubber die and is moved into the isostatic pressing device to carry out isostatic pressing. The lower rubber die covers the lower die and the workpiece after pressing is finished, then the lower rubber die, the lower die and the workpiece are turned over together, the workpiece in the lower die falls into the lower rubber die, workpieces do not need to be placed into the rubber die one by one manually, the working efficiency is improved, and the labor intensity is reduced. Meanwhile, generation of dust can also be effectively avoided, the working environment is improved, and harm to the human body is reduced.