Three new Lanthanide 2-aminoterephthalate coordination polymers: [Pr 2 (C 8 H 5 NO 4 ) 3 .(H 2 O) 5 ].2H 2 O 1, [Tb(C 8 H 5 NO 4 ) 1 . 5 (H 2 O) 2 ].2H 2 O 2 and [Eu(C 8 H 5 NO 4 ) 1 . 5 (H 2 O) 2 ].2H 2 O 3, were obtained by the hydrothermal synthesis. Crystal data: Complex 1. Triclinic, space group P-1, a=10.391(1), b=15.056(1), c=10.121(1)A. α=101.363(4), β=101.115(3), γ=105.737(3) o , Complex 2. Triclinic, space group P-1, a=10.137(1), b=10.353(1), c=9.469(1)A. α=95.443(3), β=110.649(4), γ=110.547(4) o . Complex 3. Triclinic, space group P-1, a=10.174(1), b=10.388(1), c=9.480(1)A. α=95.443(6), β=110.732(3), γ=110.287(5) o . These carboxyl groups link Ln 3 + via the chelating or bridging bond construct one-dimension channels in which pendant function groups can further connect with guest water molecules in channels through hydrogen bond.