A new structure based on carbon nanotubes and nano particles for Raman enhancement is presented. Experimental analysis is carried on. With chemical way, single-walled and multi-walled carbon nanotube films are obtained. Carbon nanotube film coated by Au nano particles samples are prepared with sputtering. Scanning electron microscope (SEM) image, reflectivity spectrum and Raman spectrum are measured. Experimental results indicate that the Raman intensity is enhanced due to Au nano particles function.