[Objective] In order to give effective data and decision supports for soil and water conservation work, this article ananlyzed the features of gully and tunnel erosion in the loess hilly and gully region of Northern China;[Methods] The present study was carried out in the Wangjiagou watershed and through historical materials, aerial photo interpretation and field investigations;[Results] (1) A total of 718 gullies and 948 tunnels are indentified in the study watershed. (2) On the basis of their location and topography, all the gullies are classfied into four types:headwater gully, hillside gully, valleyside gully and ephemeral river gully. Intricately affected by lithological composition, slope, human activities, etc, the four types gullies have significant variables in the spatial distribution. (3) Tunnels are associated with 43% of headwater gullies, 51% of hillside gullies, 6% of valleyside gullies and none of ephemeral river gullies. The headwater gullies and hillside gullies are the main area for development of tunnels.(4) The results show that statistically significant differences exist in gully length, area, cutting depth, runoff yield, and sediment yield of tunneled gullies are significantly greater than those of untunneled gullies;[Conclusion] The stuty suggest that soil erosion is dominnated by tunnel erosion, and gullies development is intricately affected by tunnel erosion in this area.