Abstract: The experiment used a perlite and drip-irrigation system to compared the effects of arbuscular mycorrhizal fungi on maize under different N and P supply levels. Research showed that: The arbuscular mycorrhizal colonization rate declined while the N and P supply levels was increasing, and AMF was no contribution to plant nutrition when the presence of high or low nitrogen or phosphorus levels. Inoculation significantly increased the plant biomass and P concentration under medial supply levels（N:2mol/L, P: 0.1mol/L）, but there was little effect on N concentration. Wherefore, The arbuscular mycorrhizal improved phosphorus nutrition on maize more than nitrogen.