IThe formation and development of niches in collapsing walls exacerbate the erosion of Benggang and threaten land resources and ecological environment. This study investigated the spatial distribution and morphological characteristics of niches in typical Benggang, analyzed their distribution patterns and evolutionary characteristics, and aimed to explore the impact of niches on Benggang. The results showed that: (1) Niches are mainly located in the lower part of collapsing walls, accounting for 45.83%, and 90.28% are developed in the sandy layer, with an angle of 30-50° (50.69%). (2) Niches have strong variability in morphological parameters, with 90.97% of the niches having a flattening ratio greater than 0.1, mainly showing elliptical and extremely elliptical shapes, 70.80% of the niches having a length-to-depth ratio and a short-to-depth ratio greater than 1, and 22.20% having a length-to-depth ratio greater than 1 and a short-to-depth ratio less than 1, reflecting that their plane morphology is mainly vertical axis extension, and the evolution stage is affected by lateral widening. (3) There is a highly significant positive correlation between the long axis, short axis and concave depth of the niche (P<0.01), and the length-depth ratio and the short-depth ratio can indirectly affect each other and jointly affect the morphological development of the niche. This study reveals the development characteristics and spatial distribution characteristics of the collapsed wall niche, providing a theoretical basis for the prevention and control of niche and collapsed ridge erosion.