Copper　raw　materials　(CRM)　and　copper　waste　and　scrap　(CWS)　are　the　two　main　sources　of　copper　manufactured　products.　Due　to　the　uneven　geographical　distribution　of　copper　production　and　consumption,　international　CRM　and　CWS　trade　developed.　However,　no　study　has　explored　the　complicated　interdependencies　between　CRM　trade　and　CWS　trade　or　investigated　the　characteristics　of　this　multiplex　trade　system.　This　study　uses　trade　records　from　1988　to　2017　to　construct　multiplex　trade　networks:　a　global　CRM　trade　network　and　a　global　CWS　trade　network.　The　evolution　of　copper　trade　from　1988　to　2017　is　reviewed,　and　the　intricate　relationships　in　the　multiplex　trade　network　are　identified.　It　is　found　that　CWS　trade　has　a　highly　positive　correlation　with　CRM　trade,　but　there　are　obvious　differences　between　CWS　trade　and　CRM　trade　in　the　multilateral　trade　structure.　Multilateral　trade　structures　driven　by　core　exporting　countries　and　core　importing　countries　are　prominent　in　CRM　trade　and　CWS　trade,　respectively.　In　addition,　the　impacts　of　China＇s　restrictive　policies　on　the　multiplex　trade　system　are　analyzed.　The　results　provide　policy　implications　for　countries　regarding　copper　resource　security　strategies　and　safeguarding　the　multiplex　trading　system.