Excessive　wear　debris　in　prosthesis　tends　to　induce　loosening,　which　is　a　major　problem　affecting　the　durability　of　long-serving　implants.　Although　bionic　synovial　fluid　can　be　used　to　improve　the　lubrication　of　artificial　joints,　the　fluid　is　often　absorbed　easily　by　the　tissues　of　human　body.　To　enhance　the　effectiveness　of　bionic　synovial　fluid,　poly(epsilon-caprolactone)-poly(ethylene　glycol)-poly(epsilon-caprolactone)　(PCEC)　hydrogel　was　prepared　as　a　carrier　for　the　bovine　serum　albumin　(BSA)　in　synovial　fluid.　It　thus　significantly　reduces　the　loss　rate　of　BSA.　Experimental　results　show　that　the　good　sustainability　and　favorable　release　ability　of　hydrogel　efficiently　prevent　the　rapid　outflowing　of　BSA.　Experiments　also　reveal　that　the　PCEC　hydrogel　inclines　to　form　a　particular　structure　with　BSA　and　thus　give　BSA　an　excellent　slow-release　performance.　Furthermore,　friction　and　wear　tests　indicate　that　the　released　solution　from　the　PCEC　hydrogel　possesses　good　lubricating　properties.　In　general,　the　average　friction　coefficient　of　released　solution　is　approximatively　77%　lower　than　that　of　the　normal　phosphate-buffered　solution.　This　study　furnishes　with　an　effective　approach　to　prolong　the　lubricating　duration　of　BSA　in　artificial　prostheses.