©　2018,　Science　Press.　All　right　reserved.Three　complexants,　maleic　acid,　sodium　citrate　and　sodium　salicylate,　were　used　to　modify　the　activated　carbon,　and　the　activated　carbon　without　modification　was　used　for　comparison.　And　the　effects　of　the　complexants　on　the　performance　of　Pd/C　catalysts　used　for　the　disproportionation　of　rosin　were　analyzed　by　FTIR,　XRD,　XPS,　and　TEM.　The　results　show　that　the　chelating　agents　deposited　on　activated　carbon　have　a　strong　bonding　ability　with　Pd　cation,　which　is　beneficial　to　form　a　smaller　Pd　particle,　enhancing　the　utilization　ratio　of　Pd.　So　the　activity　of　Pd/C　catalyst　prepared　with　the　modified　activated　carbon　is　significantly　higher　than　that　of　untreated　activated　carbon.