This study aimed to investigate the adsorption isotherm and kinetics of polysaccharide-contaminated rice noodle wastewater onto superparamagnetic nanoparticles prepared by co-precipitation method. Three selected adsorption isotherms such as two-parameter equation (Langmuir and Freundlich) and three-parameter equation (Sips) and two non-linear kinetic models such as pseudo-first and pseudo-second kinetics were analyzed the adsorption data as a function of initial polysaccharide concentration range of 7000 to 8000 mg L−1. The nanoadsorbents removal efficiency of the polysaccharide was about 60% resulting in the COD reduction ranging from 29 to 42%. In comparison of estimated coefficient of determination (R2) using the linear method, the Freundlich showed higher value of R2 (0.98) than that of Langmuir isotherm. The equilibrium was best described by nonlinear Freundlich model among three isotherms, which gained the smallest χ2 value of 0.0297 while the adsorption process followed the pseudo-first order rate expression. Moreover, the nanoadsorbent dose had a direct effect on adsorption capacity while it had an adverse effect on the polysaccharide removal percentage. The prepared nanoadsorbents effectively removed high polysaccharide contents from rice noodle wastewater with moderate adsorption capacity.