The vibration force generated by the square swing screen drive device is an inertial force that varies in a certain pattern around a fixed axis. Its essence is the reciprocating inertial force formed by the rotation of an eccentric wheel around a fixed axis. After the screen machine is started, the shaking body of the screen machine, i.e., the screen box, performs back-and-forth reciprocating motion under the action of the inertial force. The screen box drives the screen surface to undergo periodic shaking, thereby causing the material on the screen surface to perform directional jumping motion along with the screen box. During this process, materials smaller than the screen aperture fall through the screen holes to the lower layer, becoming the undersize product, while materials larger than the screen aperture are discharged from the discharge port after continuous tumbling and jumping motion, ultimately completing the screening work. Product Features: 1. Large screening capacity, multi-layer grading design, one machine divides into two groups, one machine replaces multiple machines, doubling the output; 2. Fully enclosed structure, no dust flying, low vibration and noise of the screen machine, meeting environmental protection requirements; 3. Flexible screening, acceleration is 4-5 times lower than that of ordinary vibrating screens, long screen mesh service life, thereby reducing maintenance costs; 4. More convenient screen changing, simple operation, firm and reliable.