To investigate characteristics of nitrate nitrogen transport in purple sloped soils at different periods under different rainfall events, laboratory soil tanks and simulated rainfall installation were equipped to set each single and total 12 intermittent rainfalls, and nitrate transport characteristics during short and long time periods were discussed respectively. In each soil tank, eight observed points were designed uniformly along the soil profile. The results showed that the soil water and nitrate nitrogen of purple sloped soils transported evenly from the upper 15 cm depth soil layer to the foot slope of lower 35 cm depth soil layer. However, nitrate concentrations of observed points declined rapidly from initial 345.7 mg/L to 99.7 mg/L during the first 6 rainfall events of 12 intermittent rainfalls; mean nitrate concentrations decreased from 69.7 mg/L to 52.0 mg/L during the 7^th to 9^th rainfall event, and tended to stable. As rainfall occurred, nitrate nitrogen transported towards the lower and foot of sloped soils, and the top of slope showed minimal transport. In addition, the nitrate concentration of subsurface outflow was about 1/3 of that of subsurface soil water. Overall, subsurface nitrate loss showed rapid decrease after 3 rainfall events. This research provided better understanding for nitrate transport and loss mechanism of purple sloped farmland as response to intermittent rainfall events, which was from a bran-new perspective.