This paper analyzed the yield performance by applying different quantity DCD and nitrogen fertilizer in water field and dry field.The result indicated that the increasing yield rate was 12.2%～14.3% when 8～32kg /hm² DCD was applied in water field.Applying 21.4kg /hm² DCD reached the highest yield.And the optimum DCD quantity was 20.97kg /hm² with a proportion of 1∶0.11～0.15.The increasing yield rate was 3.4～6.6when 16.5～49.5kg /hm² DCD was applied in dry field.Applying 38.6kg /hm² DCD reached the highest yield.And the optimum DCD quantity was 33.9kg /hm² with a proportion of 1∶0.15～0.18and could be used as safe applying quantity for corn.