In　anterior　cruciate　ligament　(ACL)　repair　methods,　the　continuous　enzymatic　erosion　of　synovial　fluid　can　impede　healing　and　potentially　lead　to　repair　failure,　as　well　as　exacerbate　articular　cartilage　wear,　resulting　in　joint　degeneration.　Inspired　by　the　blood　clot　during　medial　collateral　ligament　healing,　we　developed　a　composite　scaffold　comprising　collagen　(1　%,　w/v)　and　polyvinyl　alcohol　(5　%,　w/v)　combined　with　platelet-rich　plasma　(PRP).　The　composite　scaffold　provides　a　protective　barrier　against　synovial　erosion　for　the　ruptured　ACL,　while　simultaneously　facilitating　tissue　repair,　thereby　enhancing　the　efficacy　of　ACL　repair　techniques.　The　composite　scaffold　is　primarily　formed　through　hydrogen　bonding　between　molecular　chains　and　physical　cross-linking　of　microcrystalline　regions　using　a　simple　cyclic　freeze-thaw　method,　resulting　in　improved　mechanical　properties　and　an　extended　degradation　period.　The　maximum　tensile　fracture　load　of　the　composite　scaffold　reached　5.99　±　0.30　N.　The　incorporation　of　PRP　facilitates　cell　migration,　proliferation,　and　blood　vessel　growth　by　enabling　slow　release　of　various　growth　factors.　In　vivo　results　demonstrate　that　this　composite　scaffold　promotes　rabbit　hindlimb　rupture　ACL　healing　by　stimulating　fibroblast　proliferation,　collagen　deposition,　microvascular　formation,　and　proprioceptor　generation.　Furthermore,　it　effectively　reduces　meniscus　and　cartilage　wear　while　mitigating　bone　arthritis　and　joint　degenerative　diseases.　Overall,　our　proposed　composite　scaffold　holds　great　promise　as　a　candidate　for　ACL　healing.　©　2024　Elsevier　B.V.