Abstract: Performance of phosphate removal by iron-aluminum composited adsorbent is studied under different crystallization temperature, Influences of pH value and coexisting ions of CO₃^2- to performance of adsorption phosphate removal are investigated. Results show that phosphorus removal performance of the adsorbent is influenced remarkably by crystallization temperature. Phosphorus removal performance of the adsorbent prepared at lower temperature has better performance than that at higher temperature. The main reason of decreasing adsorption performance is that the specific surface area is reduced by crystal structure change caused by increasing crystallization temperature. Phosphorus removal performance of the adsorbent prepared at lower temperature is less influence by pH value. The adsorbent shows good adaptability to water quality. Phosphorus removal performance of the adsorbent is played strongly inhibitory action by coexistent ion CO₃^2-. The opposite negative interference action should be avoided in practical applications.