The nanostructured material of the metal–insulator–metal (MIM) grating with localized magnetic enhanced is designed by the inductor and capacitor (LC) circuit model. It’s shown that the electromagnetic field can greatly be enhanced when the magnetically resonance is excited. The characteristics of the localized magnetic resonance are discussed. Furthermore, the LC circuit model can be easily used to design the MIM grating for localized magnetic resonance. The geometry parameters predicted by LC circuit model match well with the results simulated by rigorous coupled-wave analysis method.