Abstract: In order to improve the utilization efficiency of drip irrigation fertilizer, and reduce the risk of environmental pollution caused by excessive fertilization, a field experiment was carried out in Hetao Irrigation District in 2015—2016 and the effects of conventional fertilization（NPK） and 12% reduction in nitrogen（N1 PK） and 24% reduction in nitrogen（N2 PK） and 36% reduction in nitrogen（N3 PK） and 48% reduction in nitrogen（N4 PK） on yield and fertilizer efficiency of maize were studied. The results showed that the treatment of N1 PK and N2 PK had little effect on the growth and yield components of maize, and had no significant effect on Yield. The treatment of N3 PK N4 PK reduced the grain number and100 grain weight, were increased the bald tip length. On average, N3 PK and N4 PK treatments reduced production by 7.9%and 13%, respectively. On average, the utilization rate of N increased with the decrease of the amount of nitrogen fertilizer,from 29.3% to 35.7%. The utilization rate of phosphate fertilizer increased first and then decreased with the increase of nitrogen application rate and reached the highest in the treatment of N1 PK and N2 PK, the average was 19.9% and 20.0%respectively. In summary, the amount of nitrogen fertilizer which was reduced by 12% -24% on the basis of the existing fertilizer amount could obtain higher fertilizer utilization rate without reducing yield in the drip irrigation condition of Hetao irrigation district.