The imaginary part of the complex permittivity of the metal nanoparticle is modified by Kawabata-Kubo (K-K) correction. The optical scattering and absorption characteristics of surface plasmons are quantitatively described. The extinction characteristics of light incident on a single ellipsoid metal nanoparticle are calculated and analyzed by Mie theory and the electric dipole theory. A optical polarization structure model of periodic array of ellipsoidal nanoparticles is established. The output characteristics of polarized light from visible to near infrared bands are simulated and calculated by COMSOL software. K-K correction is applied to finite element simulation of the metal ellipsoid arrays by replacing spherical radius with effective radius of ellipsoid. The modified metal nano-ellipsoid arrays have lower transmittance and wider extinction spectrum bandwidth, which is consistent with the experimental trend of broadband strong absorption characteristics of single metal particles.