To explore the unity use patterns of water and nutrients in Hani terrace, reveal the spatial and temporal variation of nitrogen, clarify the impact of land use on nitrogen concentration, and provide scientific basis for water environment protection and sustainable development, we used QuanFu zhuang watershed as the research object, analyzed the characteristics of spatial and temporal distribution of surface water nitrogen. The research showed that (1) Except for the strong variation of NO₃^--N concentration in summer and winter, the coefficients of variation of other N concentrations in different seasons were less than 100%, and showed a moderate variation. (2) The variations of the concentration of TN, NO₃^--N and NH₄⁺-N concentration in the lower part of the terraced fields were (0.103~0.849, 0.010~0.143, 0.052~0.446 mg/L) relatively large, and the variations of the concentration of TN, NO₃^--N and NH₄⁺-N concentration in forest surface water were (0.108~0.471, 0.003~0.102, 0.058~0.164 mg/L) relatively small. (3) The nugget coefficients of TN, NO₃^--N, and NH₄⁺-N were less than 50% in each season, and showed a strong spatial correlation in each season. The variation ranges of TN, NO₃^--N, and NH₄⁺-N were all within 1 000 m in each season, indicating that the variation was distributed continuously in different scales in each season and there was spatial autocorrelation. (4) Through Kriging interpolation, the overall TN, NO₃^--N, and NH₄⁺-N concentration in surface water of different seasons ranged as village > woodland > terrace > rivers.