Injection　of　bionic　synovial　fluid　(BSF)　is　a　conventional　method　to　improve　the　lubricity　of　artificial　joints,　but　BSF　cannot　maintain　long　due　to　the　dilution　and　degradation　of　BSF　in　human　body.　To　prolong　the　effectiveness　of　hyaluronic　acid　(HA),　which　is　the　major　component　of　BSF,　this　study　applies　a　temperature-sensitive　poly(-caprolactone)-poly(ethylene　glycol)-poly(-caprolactone)　(PCEC)　hydrogel　loaded　with　HA　to　achieve　long-term　lubrication.　In　addition,　Fourier　transform　infrared,　nuclear　magnetic　resonance　analysis,　X-ray　diffraction,　scanning　electron　microscopy　(SEM),　and　gel　permeation　chromatography　spectra　were　used　to　analyze　the　structure　of　the　synthetic　hydrogel.　Rheological　test　and　test　tube　inverting　method　were　used　to　characterize　the　thermosensitivity.　The　lubrication　properties　of　the　released　solution　were　characterized　by　UV-vis,　tribological　tests,　SEM,　and　3D　laser　confocal　scanning　microscope.　The　experimental　results　reveal　that　the　triblock　PCEC　hydrogel　contains　both　hydrophilic　block　and　hydrophobic　block,　and　both　PCEC　and　PCEC/HA　hydrogels　have　phase-changed　effect　when　the　temperature　increases　from　room　temperature　to　body　temperature.　Moreover,　the　friction　coefficient　of　the　released　solution　from　PCEC/HA　hydrogel　is　approximatively　38%　lower　than　that　of　phosphate　buffer　saline.　And　the　ability　of　shear　resistance　and　creep　recovery　of　PCEC/HA　hydrogel　are　better　than　that　of　PCEC　hydrogel.　This　study　provides　an　effective　approach　to　achieve　long-time　lubrication　effect　for　artificial　joints.　(c)　2018　Wiley　Periodicals,　Inc.　J.　Appl.　Polym.　Sci.　2018,　135,　46228.