Various shapes of three-layers composite material nanoparticles is manufactured by using high-resolution electron beam lithography method and the influence of shape on extinction properties for the nanoparticles was studied. The results show that if the direction of light source polarization is parallel to the short axis, the resonance peak gets a blue shift with the increasing aspect ratio; if the direction of light source polarization is parallel to the long axis, the resonance peak gets a red shift with the increasing aspect ratio. The extinction properties of nanoparticles is also calculated by using finite-difference time-domain algorithm and Lorentz model of surface plasmon, the curve of extinction spectra and the position of resonance peaks are basically consistent with the experimental results. Besides, the influence of thickness on extinction properties for the body material is studied, and it is found that if the thickness changed from 20 to 90 nm, the resonance peak gets a blue shift of 3~115 nm.