Two vibrating motors with the same parameters installed symmetrically on the excitation beam rotate synchronously and reversely when connected to electricity, and each generates centrifugal force of equal magnitude. The components of the two forces in the vertical vibration direction are opposite to cancel each other, and the components in the parallel vibration direction are consistent with each other. The linear vibration force is superimposed to form a linear vibration force. The linear vibration force cyclically and continuously acts on the screen body to make the screen body vibrate on the buffer spring. At the same time, the buffer spring reduces the dynamic load of the screen body on the support foundation of the screen machine. The screen body drives the screen surface to vibrate synchronously. , The force is transmitted to the material on the screen, the impact material is thrown up on the screen surface for dehydration, the material is continuously input from the feeding chute, and the dehydration treatment is carried out through the screen surface. Material chute.