Abstract: FePt/Ag films have been deposited onto a natural-oxidized Si（100）single crystal substrate by magnetron sputtering.A 10kA/m magnetic field was applied in perpendicular direction to the film during annealing in order to make the easy axis orienting perpendicular to the film.The effects of annealing temperatures on the disorder-order transformation and magnetic properties were studied.X-ray diffraction showed that the perpendicular magnetized axis can be easily achieved by multilayer design. The perpendicular magnetized FePt/Ag thin films with uniform fine grain size can be prepared through suitable annealing temperature and reduction of each layers’thickness,which suggests that this nanocomposites system has significant potential as recording media of extremely high areal density.