An　amide-structural　polycarboxylate　superplasticizer　was　synthesized　with　polycarboxylic　acid　(PAA)　and　amino-methoxy　polyethylene　glycol　(NPEG).　The　molecular　structure　of　superplasticizer　was　characterized　by　Fourier　transform　infrared　spectroscopy,　1H　nuclear　magnetic　resonance,　and　molecular　mass　and　distribution　analysis,　respectively.　The　high　conversion　of　amidation　reaction　and　the　existence　of　amide　structure　were　determined.　The　surface　tension,　hydration　heat　of　cement,　and　application　performance　in　concrete　were　measured,　and　the　corresponding　mechanism　was　analyzed.　The　results　show　that　the　lowest　surface　tension　and　hydration　heat　at　a　peak　position　is　in　the　mole　ratio　of　PAA　to　NPEG　as　4:1.　The　air　content　and　the　retention　and　frost　resistance　of　concrete　for　amide　superplasticizer　are　more　superior　than　those　for　common　superplasticizer.　The　introduction　of　amide　structure　can　improve　its　application　performance.