The normal Raman spectrum (RRS) of solanesol molecules and surface enhanced raman scattering (SERS) of these molecules adsorbted on Pt electrode surface are reported in this paper. By comparison that the results show that the molecules of solanesol is adsorbed on the Pt surface through the C=C bond. The large difference between RRS and SERS demonstrates that the interaction between the molecules and Pt surface is rather strong and this interaction leads to a large disturbance to the molecules structure of solanesol.