The　synergistic　effect　of　cyclohexane　and　cyclohexanone　promoted　synthesis　of　adipic　acid　catalyzed　by　[(MnT)-T-III(p-Cl)PP]　Cl　with　cyclohexane　and　cyclohexanone　as　co-reactants.　The　results　showed　that　the　conversions　of　cyclohexane　and　cyclohexanone　were　significantly　enhanced　because　of　the　cyclohexanone　synergistic　effect,　and　the　higher　selectivity　to　adipic　acid　was　obtained　with　dioxygen　as　an　oxidant.　The　studies　indicated　that　the　co-oxidation　of　cyclohexane　and　cyclohexanone　was　influenced　by　the　initial　molar　ratio　of　cyclohexanone　and　cyclohexane,　catalyst　structure,　catalyst　concentrations,　and　reaction　conditions.　The　preliminary　mechanism　of　the　co-oxidation　reaction　of　cyclohexane　and　cyclohexanone　using　[(MnT)-T-III(p-Cl)PP]Cl　as　the　catalyst　was　proposed.