The simulated rainfall experiments were conducted to explore the loss rules of runoff,sediment,and nutrient on the loess vegetated sloping land under the coupling effects of different rainfall intensity (60 mm/h,90 mm/h,120 mm/h),slope (10°,15°,20°),and biochar content (0,3%,6%).The results showed that: (1) The loss of runoff,sediment,and PO₄^3-—P increases with the increase of rainfall intensity,and NO₃^-—N increases firstly and then decreases with the increase of rainfall intensity. The rules of runoff,nitrogen,and phosphorus with slope were not obvious. The influence of rainfall intensity was greater in the linear relationship between the rainfall intensity,slope,and the changing rate of k value (sediment yield rate coefficient). (2) The processes of runoff and sediment yield were similar,they both first rose and then stabilized with the progress of rainfall. The NO₃^-—N had a power function relationship with the rainfall duration. The ratio of the maximum concentration to the minimum concentration of PO₄^3-—P during loss was between 1 and 2. In the process of sediment yield and NO₃^-—N loss,the correlation between rainfall intensity and biochar was extremely significant. (3) The increase of biochar content (≥3%) could increase the sediment yield and loss of PO₄^3-—P. When the rainfall intensity was 60 mm/h and 90 mm/h,the amount of NO₃^-—N loss decreased firstly and then increased with the increase of biochar content. When the rainfall intensity was 120 mm/h,the amount of NO₃^-—N loss depended on the amount of added biochar. The results can provide scientific guidance for the management of soil and water resources in the loess hilly and gully region.