Thermosensitive　PCEC　hydrogel　was　synthesized　by　a　ring-opening　polymerization　method,　reacting　in　situ　phase　transition　at　37℃.　Bovine　serum　albumin　(BSA)　and　chitosan　(CS)　were　wrapped　in　gel　by　using　crosslinking　polymerization　embedding　technology　to　perform　in　vitro　slow-release　test.　The　tribological　performance　of　slow-release　lubricant　carried　by　PCEC　hydrogel　was　tested　by　friction　and　wear　tests,　and　the　wear　surface　is　analyzed　by　SEM　and　AFM.　The　results　reveal　that　the　total　releasing　amount　of　BSA　is　only　15%　of　the　amount　of　BSA　in　gel　before　the　slow-release　test　by　slow　releasing　for　35　days.　Under　the　same　friction　condition,　the　friction　coefficient　of　the　slow　release　liquid　is　stable,　and　the　maximum　frictional　coefficient　of　the　slow-release　liquid　is　only　about　37%　of　the　saline,　64%　of　the　simulated　body　fluids,　and　82%　of　the　bovine　serum　albumin　solution.　The　friction　coefficient　of　the　slow-release　liquid　decreases　with　increasing　load　and　reciprocating　frequency.　The　adsorption　of　protein　on　the　surface　of　the　sample　can　effectively　reduce　the　friction　and　wear　of　the　artificial　joint　material.　©　2017,　Editorial　Office　of　CHINA　SURFACE　ENGINEERING.　All　right　reserved.