Gel polysaccharide flexible luminescence film containing rare earth, and preparation method thereof

The invention discloses a gel polysaccharide flexible luminescence film containing rare earth, and a preparation method thereof. The gel polysaccharide flexible luminescence film comprises a rare earth luminescent material and an organic ligand modified gel polysaccharide derivative (as a second ligand) at a mass ratio of 1:50; the a rare earth luminescent material comprises an organic ligand andclay; the rare earth ion exchange capacity of the clay is about 0.3 to 1.1/unit; the rare earth element is one or a plurality of elements selected from Ln series luminescent elements, the organic ligand is alpha-thenoyltrifluoroacetone, 1,10-Phenanthroline monohydrate and a terpyridyl are taken as first ligands, the gel polysaccharide derivative comprises a gel polysaccharide and a carboxyl functionalized organic ligand at a molar ratio of 1:5. The invention also discloses a modification method of the gel polysaccharide derivative, a preparation method of the luminescent material, and the preparation method of the gel