When the jaw crusher is in operation, the eccentric shaft is driven to rotate by the belt pulley driven by the motor, allowing the movable jaw to periodically approach and leave the stationary jaw, thereby causing multiple crushing such as squeezing, rubbing, and grinding of the material entering the crushing chamber, causing the material to be crushed to change from a large particle size to a small particle size and gradually fall until the particle size meets the requirements and is discharged from the crusher.