Abstract: The problem about scouring on bedrock is one of important issue in hydraulics engineering.In order to know about the probability of numerical simulation of scouring on river bed,experiments are done; a set of mathematical model is developed; and the scouring on bedrock is simulated.The calculated results accord with the experimental data,which shows that the numerical simulation of scouring on bedrock is reasonable and feasible under the condition of knowing the characteristic of bedrock material.