A　novel　post　intermittent　aeration　anaerobic-anoxic-oxic　(PIA-A(2)/O)　process　was　developed　to　integrate　shortcut　nitrification-denitrification　with　denitrifying　phosphorus　(P)　removal　for　domestic　sewage　treatment.　With　the　transformation　in　configuration　and　phased　start-up　strategy,　the　nitritation　rate　and　the　ratio　of　denitrifying　phosphorus　accumulating　organisms　to　phosphorus　accumulating　organisms　(DPAO/PAO)　were　enhanced　greatly　to　88.2%　and　83.9-91.7%　in　the　PIA-A(2)/O　process,　respectively.　Improved　total　nitrogen　and　phosphorus　removal　were　achieved　at　long　sludge　retention　time　and　low　aeration.　High　sludge　activity　was　maintained　through　the　periodic　selection　of　the　additional　intermittent　aeration　zone.　High-throughput　sequencing　revealed　that　Bacteroidetes　(38.96%),　Proteobacteria　(33.59%),　TM7　(4.53%),　Chloroflexi　(3.09%),　and　Firmicutes　(2.49%)　were　the　dominant　phyla　in　the　resultant　bacterial　community.　Abundant　anaerobic　and　facultative　bacteria　conducive　to　excess　sludge　reduction　were　generated　by　this　process.　Potential　DPAOs　involve　the　genera　of　Brevundimonas,　Brachymonas,　Steroidobacter,　Haliscomenobacter,　and　Rhodocyclus.