The　low　power　consumption　is　one　of　the　critical　features　of　the　integrated　circuit　(IC)　quality.　The　power　optimization　has　become　indispensable　research　in　modern　very　large　scale　integration　(VLSI)　design.　Nowadays,　some　studies　are　carried　out　in　achieving　lower　power.　The　design　of　voltage　island　is　an　efficient　way　to　reach　the　goal.　In　this　paper,　the　authors　have　proposed　a　novel　optimization　approach　based　on　the　Salp　Swarm　Algorithm　for　multiple　voltage　islands　generations　at　the　post-floorplanning.　We　call　this　method　＂SSA-MSV＂.　Furthermore,　experiment　analysis　and　results　show　that　the　SSA　has　high　exploration　and　local　optima　avoidance.　The　new　SSA　we　proposed　has　excellent　potential　in　solving　the　voltage　island　distribution　problem.