This　work　presents　a　method　for　one-pot　synthesis　of　N-doped　nanometer-size　carbon　dots,　which　can　be　assembled　with　thermosensitive　poly(epsilon-caprolactone)-poly(ethylene　glycol)-poly(epsilon-caprolactone)　(PCL-PEG-PCL,　PCEC)　hydrogel　to　achieve　slow-release　lubricity.　The　typical　property　of　this　green　production　was　studied　by　fourier　transform　infrared　(FT-IR),　X-ray　diffraction　(XRD),　X-ray　photoelectron　spectroscopy　(XPS)　and　transmission　electron　microscope　(TEM).　The　photoluminescence　of　composite　PCEC/CDs　hydrogel　and　its　released　solutions　were　characterized　by　ultraviolet　spectrum,　and　the　rheological　properties　were　tested　by　rotary　rheometer.　Tribological　performance　of　the　released　solution　from　composite　PCEC/CDs　hydrogel　was　obtained　to　compare　with　PBS　and　pure　CDs　solution.　The　experimental　results　reveal　that　the　CDs　contain　the　chemical　groups　of　N-H,　C-OH/C-O-C　and　-COOH,　etc.　In　addition,　the　diameter　of　the　CDs　is　in　the　range　of　6　similar　to　8　nm.　The　phase　transition　behavior　of　PCEC/CDs　hydrogel　can　be　still　kept　and　its　viscoelasticity　hydrogel　is　improved　by　approximatively　7%.　Furthermore,　friction　coefficient　of　the　released　solution　from　composite　PCEC/CDs　hydrogel　decreases　by　about　70%　than　that　of　PBS.　Besides,　the　wear　condition　can　be　improved　by　a　lubricating　transfer　film　formed　by　released　CDs.　This　novel　strategy　for　slowrelease　application　is　valuable　for　drug　delivery　and　bio-tribology.