In　order　to　find　a　green　oxidation　process　of　p-nitrotoluene,　its　oxidative　reaction　by　oxygen　in　alkaline　liquid　system　catalyzed　by　cobalt-tetracarboxylphthalocynine,　which　was　deposited　on　activated　carbon　black,　has　been　studied　in　this　paper.　It　was　found　that　cobalt-tetracarboxylphthalocynine　loaded　on　activated　carbon　black　was　more　active　than　that　unloaded,　meanwhile　the　bigger　the　specific　surface　of　activated　carbon　black　is,　the　more　the　activity　of　the　catalyst　is.　The　highest　yield　of　P-nitrobenzoic　acid　was　87.6%　when　the　reaction　temperature　was　55°C　and　the　oxygen　pressure　was　2.0　MPa.　This　process　has　advantages　of　simple　operation　and　easy　separation　of　product.