In order to explore the effects of amount reduction of water and nitrogen on yield and benefit of spring maize under the shallow buried drip irrigation in Xiliaohe Plain, the regression model of yield and economic benefit were set up to analyze the interaction relations between yield, economic benefits and irrigation amount, nitrogen application using average yield（Y） and economic benefits（Y’） of the two year as the dependent variable and irrigation amount（W） and nitrogen application rate（N） set by the test as independent variable by adopting split plot design to carry out field location test in 2018-2019.The results showed that irrigation amount and nitrogen application rate had a promoting effect on the increase of yield and economic benefits and the influence degree was nitrogen application rate ＞ irrigation amount, and interaction of irrigation amount and nitrogen application rate had positive effects on yield and economic benefits within the range of independent variables set by the experiment. When the irrigation amount and nitrogen application rate were respectively 2 372 m³/ha and 291.9 kg/ha, the yield was the highest,reaching 13 097.59 kg/haby yield model optimization; When the irrigation amount and nitrogen application rate were respectively 2 344 m³/ha and 276.6 kg/ha, the economic benefit was the largest, reaching 15 619.93 yuan/ha by economic benefit model optimization. Comprehensive yield and economic benefits, the suitable irrigation amount and nitrogen application amount of shallow burying drip irrigation and fertilizer integrated cultivation mode of Spring Maize in Xiliaohe Plain are 2 344-2 372 m³/ha and 276.6-291.9 kg/ha,respectively. In this range of water and nitrogen, it can achieve high efficiency of water and nitrogen utilization and obtain high yield and considerable economic benefits, which can provide certain reference for spring maize planting under the shallow buried drip irrigation and close planting in Xiliaohe Plain.