As one of the typical ecologically fragile areas in the Yellow River Basin, the Pisha sandstone area is difficult to control soil erosion, meanwhile the distribution of topography and erosion in the slope and gully systems is quite different in this area. Most of the studies on regional soil erosion have focused on the spatial distribution of erosion and the differences in erosion between different land types, but less work has been done on regional erosion from the perspective of slope and gully systems, which can’t provide theoretical support for subsequent refined management. In this study, three typical small basins located in Jungar Banner were selected as the study area, firstly, the slope and gully system were divided according to the shoulder line extracted by visual interpretation, and then the distribution and correlation between topography and hydraulic erosion based on geostatistics were carried out. The Results showed that the distribution characteristics of topographic factors in the selected basins were consistent with the distribution of geomorphological characteristics, the high values were concentrated in the gully system, while the low values were concentrated in the slope system, meanwhile the maximum statistical values of the topographic factors appeared in the gully system of Telagou small basin (covered with sand). There existed differences in the spatial distribution of water erosion between the slope and gully systems in typical basins, in which the slope systems were dominated by slight erosion, accounting for 87% to 97%, and the proportion of slight erosion in gully systems were 54% to 72% lower than that in the slope systems, while the highest average soil erosion modulus occurred in the gully system of Shibuertai small basin (bare rock), up to 97.5 t/(hm²·a). There was a significant positive correlation between slope, roughness, cutting depth and soil erosion modulus (p<0.001). Sunny slopes were the main distribution direction of the units above the intensity erosion, accounting for 56.8% to 75.8%. To sum up, gully systems and their sunny slopes were the parts that need to be strengthened urgently in the subsequent comprehensive management of small basins in this area.