Abstract: The adsorption performance of a new type of adsorption material based on the fly ash and activated carbon as main contents was researched.The effect of it treating DMAC（N，N-dimethyl acetamide） contained wastewater was investigated by the single factor experiment.The optimum preparation conditions：the mass ratio of fly ash to activated carbon was 3∶1，sodium silicate dosage was 25%（mass fraction of sodium silicate accounts for total mass of fly ash，activated carbon，and sodium silicate）， and the calcining temperature was 800 ℃.The optimum conditions of the new material treating the DMAC wastewater were: pH was 3，adsorbent dosage was 25 g/L，absorbing time was 40 min，and absorbing temperature was 30 ℃.The removal rate of CODCr reached 75.92% under the best conditions.

Key words: fly ash, sodium silicate, DMAC, activated carbon