The physical model of magnetic motional plasma (MMP) is defined. Adopting method of perturbation theory to derive dielectric rate tensor of system, MMP shows a completely different form of the dielectric tensor with the static magnetic plasma. The results, given by numerical computation for propagating longitudinal wave, reveal that resonant frequency of system nonlinearly enhance with the increasing of plasma density; At the same conditions resonant frequency of dextral wave is higher than that of sinistral wave, The resonant frequency of system enhances with longitudinal magnetic field descends for the propagating dextral electromagnetic wave, but for the sinistral one.