In order to find out the difference of soil rill erodibility (K_r value) under different near-surface hydrological conditions in different spatial parts of gullies with different active degrees in dry-hot valleys of China, different active gullies were selected in Yuanmou County of Yunnan Province, and soil samples of different spatial parts (upstream catchment area, gully wall and gully bed) were collected, and the "V" type rill simulation scour device was used to carry out drainage scour experiment under three hydrological conditions (drainage, saturation and seepage), the flow rates were set as 150, 300, 450, 600, 750 and 900 mL/min. The results showed that: (1) In gully development area of dry-hot valley, the content of soil sand was significantly higher than that of silt and clay, accounting for more than 50%, and the content of soil organic matter (SOM) and total nitrogen (TN) was relatively low. (2) There were significant differences in mechanical composition and organic matter content among gullies with different active degrees, as the gully stability increased, the soil sand content gradually decreased, while the content of silt, clay, SOM and TN increased. (3) Under different near-surface hydrological conditions, as the gully stability increased, the soil rill erodibility (K_r value, s/m) of gully decreased, which followed the order of K_r (active type) > K_r (semi-stable type) > K_r (stable type). In addition, an obvious difference in soil critical shear force (τ_c, Pa) appeared in gullies with different activity degrees, while no obvious change tendency could be found. (4) Significant differences in K_r values could be found in the different parts of gully, which followed the order of K_r (upstream catchment area) < K_r (gully wall) < K_r (gully bed). (5) With the change of near-surface hydrological conditions from drainage state to saturation and seepage state, values of K_r in the different spatial parts of gully increased significantly. In conclusion, gully activity (vegetation restoration condition), near-surface hydrological condition, soil particle size fraction and content of SOM could obviously affected soil erodibility in the gully developed areas of dry-hot valley.