With strong,the same size of monstereo as materials,the effect of different concentrations of NAA(20,50,100,200,300 mg/L) treatment on hydroponics monstera root were studied.The results showed that the suitable concentration of NAA treatment could shorten the rooting time,increase the quantity of root,promote root elongation,but the concentration should not be too high,otherwise it will inhibit growing of the root.The effect of the treatment with 50 mg/L NAA was the best.