The motor drives the mobile jaw up and down through eccentric shaft. The angle between toggle plate and mobile jaw increases when mobile jaw plate moves up. So the mobile jaw plate closes up the fixed jaw plate. The stuff will be crushed in this process. The angle between toggle plate and moving jaw decreases when mobile jaw moves down. The mobile jaw plate move away from stationary jaw plate with the pulling of draw rod and spring, so the crushed stuff will be discharged from the outlet. This process will repeat. The moving jaw will crush and discharge the stuff circularly.