Abstract: The guiding structure can divert landslide-induced debris flows away from mountainous buildings or engineering layout areas. To investigate the influence of guiding structures on the movement and accumulation characteristics of landslide debris flows, this study employed the discrete element method to analyze the effects of guiding angle, particle gradation, and guiding width on the accumulation pattern in the dead zone, the distribution of impact forces, and overall deposition features. The following conclusions are drawn: variations in the guiding angle significantly affect the accumulation pattern in the dead zone, whereas particle gradation and guiding width have only minor influences. As the guiding angle increases, a higher proportion of medium and coarse particles enhances the flow of particles on the impact surface, leading to increased throwing and diffusion angles of bypassing particles; strong force chains become mainly concentrated at the lower part of the guiding structure. In contrast, an increase in guiding width reduces the difference between the throwing angle and diffusion angle of bypassing particles, resulting in a more concentrated movement of the landslide debris flow. Flowing particles govern the fluctuation of the impact force curve and the peak impact force on the upper part of the guiding structure during the dynamic impact stage, while particles in the dead zone control the stability of the impact force curve and the peak impact force on the lower part throughout the entire impact process. A larger throwing angle of bypassing particles corresponds to greater accumulation length, accumulation area, and maximum deposit thickness, but a smaller accumulation width. These simulations provide insights of scientific value for designing control structures for landslide debris flows.