Aiming at the problem that the dark moraines in the Guanyinbei reach of the upper reaches of the Yangtze River can not be washed effectively and the shallow area is easy to become shallow and hinder navigation，this paper proposes two different regulation schemes，establishes two-dimensional mathematical model of the reach by numerical simulation method，and studies the regulation effect after implementation of the two schemes.The results show that after the implementation of the scheme，the water depth in the shallow area is above 3.5 m，which achieves the expected regulation goal.The local water flow pattern is significantly improved，and the maximum flow rate increase of the two schemes under the design flow rate is 0.798 m/s and 0.995 m/s respectively.Scheme 2 has a greater impact on the river boundary conditions than scheme 1，and the local beach elimination judgement is more than the critical value of 3.92，which is unfavorable to the passage of ships.Therefore，scheme 1 is selected as the recommended scheme for the beach.The results of the study can provide support for the determination of the subsequent regulation schemes in this section of the river.