In order to respond to the strategic deployment of ecological protection and high-quality development of the Yellow River Basin, to solve the problem of separating river sand mixtures in the lower reaches of the Yellow River, and to improve the screening efficiency of river sand separation by linear vibrating screen, a large amount of literature is consulted, which show that the main factors affecting the screening efficiency and the screening quality during the screening process of linear vibrating screen are: the vibration frequency, the amplitude, and the inclination angle of the screen surface. Therefore, this paper takes sand as the research object, simulates the screening process of sand under different parameters in linear vibrating screen based on the discrete unit method (EDEM) , uses Hertz-Mindlin with JKR contact model, by changing the parameters of vibration frequency, amplitude, screen surface inclination angle, observes its impact on the screening performance and changes in the screening process of the material, and obtains the optimal screening efficiency with the screening efficiency of sand as a measure. As a measure, the vibration parameter set of optimal screening performance was obtained. Through analyzing the simulation results, it is found that the optimal vibration parameters of linear vibrating screen are: vibration frequency f =25Hz, amplitude A =4mm, screen surface inclination angle φ=4°, and the screening efficiency can reach 95. 77%. The results of this study show that the discrete element method has a good reliability for different process parameters to produce screening efficiency, and the study can provide a corresponding reference for the selection of vibrating screen parameters.
