Abstract: Undesirable geologic bodies hidden in slopes can lead to disasters such as ground subsidence and landslides. In order to prevent people from being exposed to the risk of slope damage, it is important to identify the distribution of hidden undesirable geologic bodies. In this paper, small-loop transient electromagnetic system (FCTEM) is used to probe the near-surface region of a slope in detail. A spatially constrained laminar model is used for inversion. Based on abrupt changes in local resistivity, unstable slopes with developed and fragmented rock fissures and potential avalanche areas are localized. Moreover, we unite the lithospheric material composition to further reveal the material structure of the slope area using geological investigations and stratigraphic stratigraphy as horizontal and vertical constraints. The continuous undulation of the strata and the location of rock-fracture development, mixed interbedding is accurately and quantitatively imaged. More interestingly, from the resistivity profile results of the spatially constrained laminar inversion model, it is found that vertically isolated localized resistivity anomalies may be mixed geotechnical interlayers or rock trenches, and horizontally isolated resistivity anomalies may be rock fissures. It is also demonstrated that the small-loop transient electromagnetic system has excellent horizontal and vertical resolution for near-surface detection.