The invention relates to a rare-earth organic coordination polymer, and a preparation method and application thereof. The rare-earth organic coordination polymer has the following chemical formula: {(bpy)[Re(ip)1.5(H2O)4]}n, wherein bpy is 4,4'-bipyridyl, ip is isophthalic acid divalent negative ions, Re is one or more of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc, Y and the like,and n is degree of polymerization. A hydro (solvent)-thermal synthesis method is used for preparing the rare-earth organic coordination polymer, is environment-friendly and easy to operate, low in cost and high in yield, and is suitable for large-scale industrial production. The prepared rare-earth organic coordination polymer has the good application prospects in fields of luminescence, catalysis, adsorption, magnetism, ion exchange, high polymer material aids and the like.