It　is　difficult　to　achieve　high　standard　effluent　through　conventional　nitrification-denitrification　process　treating　mature　leachate　and　the　advanced　treatment　is　usually　required.　This　study　proposed　an　economical　process　for　enhancing　nitrogen　removal　from　nitrate-rich　leachate　which　combined　partial-denitrification　and　anammox　(PD/A)　in　a　SBR.　Under　the　concentration　of　influent　ammonia　and　nitrate　of　47.5　mg/L　and　93.7　mg/L　on　average,　TN　removal　efficiency　of　84.8%　was　obtained　with　the　effluent　TN　less　than　20　mg/L.　It　was　found　that　enhanced　nitrogen　removal　of　mature　landfill　leachate　through　PD-anammox　was　estimated　to　save　40%　organic　carbon　addition　and　reduce　the　cost　of　sludge　treatment　in　this　study.　Moreover,　the　ORP　and　pH　could　potentially　be　used　as　control　parameters　to　maintain　the　stability　of　combined　process.