岩石河床的抗冲能力，实质上反映了基岩在挑射水流的冲击下抵抗解体破坏的能力。此文初步分析了影响基岩解体破坏的主要因素，运用量纲分析法，探讨了影响基岩抗冲能力的三个无量纲数。并在此基础上，通过综合分析各家的抗冲能力分类表，给出一个考虑因素较多的基岩抗冲分类的推荐表。 The impact resistance of rocky river beds essentially reflects the ability of bedrock to resist disintegration under the impact of a jet of water. In this paper, the main factors affecting the disintegration of bedrock are analyzed preliminarily. By using dimensional analysis method, the three dimensionless numbers that affect the impact resistance of bedrock are discussed. On the basis of this, a comprehensive table of the impact-ability classification of each house is given and a recommendation table of bedrock impact classification is given.