Abstract：The leading water channel is accompanied by some“compound accumulation body”when it passes high slope. It is a combination of bed rock，ancient collapsing body，ancient sliding body and the Quaternary Period precipitation body. By observation，it is found that is the same as the bed rock. Some accumulation bodies may be regarded as cleavage，and are broken and deliquesce heavily. For a high slope of a canyon，its appearance looks like accumulation body，but some part is the same as the bed rock. Part of the lithology is the same as bed rock，while some is changed to crushed stones，crushed stones and soil. It is“compound accumulation body”. After analyzing the reason for formation of it，the treatment methods are proposed.
