Vitrimers,　as　intriguing　polymers,　possess　exchangeable　links　in　the　crosslinking　networks,　endowing　them　with　the　abilities　of　recycling　and　reprocessing.　However,　most　of　vitrimers　are　generally　fabricated　via　complex　synthesis　and　polymerization　processes.　Toxic　and　unstable　exogenous　catalysts　are　inevitably　applied　to　activate　the　exchange　reaction　to　rearrange　the　crosslinking　networks.　These　drawbacks　limit　the　widespread　applications　of　vitrimers.　Moreover,　most　reported　vitrimers　could　only　partially　maintain　or　severely　deteriorate　their　mechanical　properties　after　recycling.　Herein,　to　solve　the　above-mentioned　problems,　for　the　first　time,　a　catalyst-free　and　recycle-reinforcing　elastomer　vitrimer　is　revealed.　By　the　reactive　blending　of　commercially　available　epoxidized　natural　rubber　and　carboxylated　nitrile　rubber,　the　elastomer　vitrimer　associated　with　exchangeable　β-hydroxyl　ester　bonds　was　obtained.　Strikingly,　the　vitrimer　exhibits　an　exceptional　recycle-reinforcing　property.　This　work　provides　a　feasible　method　to　fabricate　elastomer　vitrimers,　which　promotes　the　recycling　of　crosslinking　commercial　available　elastomers.　This　journal　is　©　The　Royal　Society　of　Chemistry.