This study synthesized a new copolymer gel (Polygel-NH2) containing amine functional groups, Poly (vinylbenzylchloride-co-2-aminoethyl methacrylate), with super-fast and selective adsorption properties. Subsequently, hyper-cross-linking new HyPolygel-NH2 polymer gels were produced by Friedel-Crafts alkynation (with FeCl3) of Polygel-NH2. These polymer gels were utilized for anionic Congo red (CR) and Methyl orange (MO) dye adsorption and cationic Methylene blue (MB) separation. It was ascertained that they possess remarkably elevated capacity and separation. Notably, Polygel-NH2 (CR: 2147 mg/g and MO: 2113 mg/g) and HyPolygel-NH2 (CR: 5234 mg/g and MO: 1816 mg/g) exhibited remarkably high dye capacity, in comparison to other previously reported adsorbents. Polymer gels were thoroughly investigated for their physicochemical characterizations, such as FTIR, TEM, SEM, XPS, BET, XRD, kinetics, isotherms, thermodynamic parameters, and pH properties. The findings indicated that the pseudo-second-order model (PSO) provided a more comprehensive explanation of the mechanism between polymer gels and dye molecules in kinetic studies. Isotherm studies demonstrated that the Sips and Langmuir models provided a more favorable fit for the CR adsorption of Hypolygel-HN2 and Polygel-NH2, while the Freundlich model gave a better fit to the adsorption of the MO. Thermodynamic parameters showed that the reaction was exothermic, spontaneous, and disordered. Electrostatic, it-it interactions, and H-bonding dominated the adsorption mechanism. Polygel-NH2 exhibited good reusability with 70 % adsorption after four adsorption-desorption cycles. The findings of this study demonstrate that Polygel-NH2 and HyPolygel-NH2 have the potential to function as effective and promising adsorbents for anionic dyes.