Bottom tearing" phenomenon is a unique way of sediment movement that high concentrated sediment flood possesses in the Yellow River. Based on the historical" bottom tearing" hydrological data statistics and analysis, the paper put forward the historical" bottom tearing " occurred in the water and sediment conditions, boundary conditions of river channels, channel deposit, and summarized its occurrence regularity. The study further explored bottom tearing scouring phenomenon" movement mechanism in Xiaobeigan main stream of the Yellow River", fully play its positive effect of the "bottom tearing scour shaping" narrow and deep channel, reduced its scour harm and have certain guidance meaning for treating the Yellow River in how to use "bottom tearing" law, draw on the advantages and avoid disadvantages.