In order to effectively prevent and control nitrogen loss in the growth stages of maize in the purple soil area during rill erosion stage, the soil erosion and nitrogen loss was studied. The artificial simulated rainfall combined with field runoff plot experiments were used to study the characteristics of nitrogen loss, including surface runoff, interflow and sediment yield, soil flow and erosion sediment, in the whole stages of maize during rill erosion stage under the rainfall intensity of 1.5 mm/min. The results showed that surface runoff, interflow and sediment yield were increased first with rainfall duration, and the values tended to peak during maize growth stages at rill erosion. Total nitrogen, soluble total nitrogen, nitrate and sediment yield in surface runoff showed an overall trend of first increase and then stability, while ammonium nitrogen loss showed volatility in the early rain period and became steady gradually with rainfall duration. The total nitrogen losses in surface runoff were the highest at seedling stage of maize, and the maximum was 628.77 mg/m². The total nitrogen losses in interflow were the highest at jointing stage and tasseling stage of maize. The total nitrogen losses in sediment yield were the highest at seedling stage of maize, and the maximum was 144.95 mg/m².Interflow were the main channels for nitrogen losses, and nitrate nitrogen was the main form of nitrogen loss during the rainfall process.