The nanoscale hydrated aluminium oxide composite resin (AlD301) was successfully synthesized through incorporation of nano hydrated aluminium oxide into the weakly basic resin D301 as supports. The adsorption behavior of weakly basic anion exchange composite resin AlD301 to N-(Phosphonomethyl)iminodiacetic acid (PMIDA) was studied. The influences of pH, initial concentrate of PMIDA, contact time and temperature on the adsorption process were investigated. The results showed that the adsorption capacity of AlD301 reached the maximum when the temperature was 303 K and the time was about 2.5 h. The adsorption experimental data fitted well to the Freundlich isotherm model. The second-order adsorption kinetics equation was described for this process, and the related parameters were showed in the paper. The results demonstrated that AlD301could be an idea adsorbent for removal PMIDA from aqueous solution.