This　paper　proposes　a　high-throughput　short　reference　differential　chaos　shift　keying　cooperative　communication　system　with　the　aid　of　code　index　modulation,　referred　to　as　CIM-SR-DCSK-CC　system.　In　the　proposed　CIM-SR-DCSK-CC　system,　the　source　transmits　information　bits　to　both　the　relay　and　destination　in　the　first　time　slot,　while　the　relay　not　only　forwards　the　source　information　bits　but　also　sends　new　information　bits　to　the　destination　in　the　second　time　slot.　To　be　specific,　the　relay　employs　an　N-order　Walsh　code　to　carry　additional　log2N　information　bits,　which　are　superimposed　onto　the　SR-DCSK　signal　carrying　the　decoded　source　information　bits.　Subsequently,　the　superimposed　signal　carrying　both　the　source　and　relay　information　bits　is　transmitted　to　the　destination.　Moreover,　the　theoretical　bit　error　rate　(BER)　expressions　of　the　proposed　CIM-SR-DCSK-CC　system　are　derived　over　additive　white　Gaussian　noise　(AWGN)　and　multipath　Rayleigh　fading　channels.　Compared　with　the　conventional　DCSK-CC　system　and　SR-DCSK-CC　system,　the　proposed　CIM-SR-DCSK-CC　system　can　significantly　improve　the　throughput　without　deteriorating　any　BER　performance.　As　a　consequence,　the　proposed　system　is　very　promising　for　the　applications　of　the　6G-enabled　low-power　and　high-rate　communication.　　©　China　Communications　Magazine　Co.,　Ltd.　October　2023.