In　this　work,　on　the　basis　of　finite　difference　time　domain　simulations　and　group　theory,　by　employing　regular　nanosphere　trimers　as　the　main　examples,　we　analyse　and　discuss　the　polarization-independent　surface　enhanced　Raman　scattering　(SERS)　phenomenon　arising　from　the　rotation　symmetry　of　coined　metallic　nanomultimers.　The　results　demonstrate　why　the　rotationally　symmetrical　nanomultimers　can　show　polarization-independent　SERS　performance.　Because　of　the　dramatically　hybridized　polarization-independent　SERS　performance　over　the　whole　360　degrees　range,　rotationally　symmetrical　coined　metal　nanomultimers,　such　as　regular　trimers,　regular　triangular　tetramers　and　regular　pentamers,　are　reliable　and　reproducible　SERS　substrates,　which　have　the　potential　for　convenient　and　flexible　practical　SERS　detection　without　the　need　for　optimally　incident　polarization　outside　the　laboratory　setting.