The field experiment was carried out to study effect of applying different mixing ratio of the sulfur plus Resin-coated urea on maize.The results indicated that the optimum ratio was 50% PCU + 50% PU.The yield with 50%PCU + 50%PU treatment was the highest compared with the other treatments,which increased by 391kg/ha（3.5%） to 1535kg/ha（15.3%）,and whose utilization rate for N was the highest（44.5%）.