[Objective] The present situation of gully erosion in a black soil area (450 km²) was evaluated to provide the basis for the hazard assessment and scientific prevention and control of erosion gully in the black soil area of Northeast China.[Methods] We selected an undulating hilly region that was seriously affected by gully erosion as the research area for a field survey. We first located the erosion gullies on a Google satellite image and then measured their three-dimensional shape in-situ.[Results] ① Land in the study area is mainly used for farming. The results showed that cultivated land, construction land, forest land, and grassland accounted for 85%, 8%, 6%, and 1% of the total area, respectively. ② Cultivated land on slopes accounted for 86% of the total cultivated land area; 64% of the slopes in these areas had a gradient of between 0.25° and 3.0°, and 12% had a gradient of > 5°. ③ We found 1 049 erosion gullies in the research area, 55% of which were on cultivated land (577 gullies). The gully density was 1.2 km/km² and the gully erosion intensity was moderate. The proportion of the gully area was 2.89% of the total study area, which indicated an intense erosion gully. ④ The average length, width, depth, and area of the erosion gullies were 996, 13.1, 2.7 m, and 2.4 hm², respectively.[Conclusion] Gully erosion is serious in the study area of undulating hills, and mainly affects sloping cultivated land; however, the scale of erosion gullies is relatively small and the gullies can be easily managed.