FePt (50nm) and [FePt(a nm)/MgO(b nm)]5/glass (a=1,2,3; b=l,2,3) films were prepared by radio frequency (RF) magnetron sputtering technique, and then were annealed at 600℃ for 30min. The effect of MgO layer thickness on the structures and magnetic properties of the FeWMgO multilayers was investigated. The coercivities and inter-grain interactions of the FeWMgO films were decreased, yet the degree of (001) texturing drastically increased with the increase in MgO layer thickness when the FePt layer thickness was fixed. Thus, the FeWMgO films with appropriate coercivities, high perpendicular anisotropy, and weak intergrain interactions were obtained by controlling the MgO layer thickness. Overall, these results indicate that the FeWMgO nanostructured films are promising candidates for future high-density perpendicular recording media.