This　study　investigated　the　mechanical　properties　of　zinc-5%　aluminium-mixed　mischmetal　alloy-coated　steel　strand　cables　(M-C　cables)　and　internal　steel　wires　under　cyclic　loading-unloading　and　a　collaborative　working　mechanism　by　numerical　analysis.　Cyclic　loading-unloading　tests　were　performed　on　M-C　steel　wires　with　two　sizes　of　cross　section.　The　stress-strain　curves,　the　nonlinear　recovery　characteristics　of　the　M-C　steel　wires,　and　an　exponential　model　of　the　relationship　between　the　chord　modulus　and　strain　at　the　unloading　point　were　obtained.　Based　on　a　mathematical　model　of　the　variable　elastic　modulus,　a　refined　finite　element　analysis　of　normal　M-C　cables　and　locked　M-C　cables　under　loading-unloading　was　performed,　and　the　correctness　of　the　model　was　verified　by　comparisons　with　the　test　results.　The　stress　development　of　each　steel　wire　layer,　the　contact　pressure　between　the　steel　wires,　the　influence　of　friction　energy　dissipation　between　the　wires　on　the　internal　strain　energy　of　the　cable　and　the　radial　displacement　of　the　cable　under　cyclic　loading　were　investigated.　The　collaborative　working　mechanism　for　M-C　cables　and　internal　steel　wires　was　evaluated.