Average velocity of materials and doing work by vibration surface will change because of different motion of materials and different friction between materials and vibration surface under different vibration condition. The work done by vibration surface on materials while vibrating conveyer operating, which are used to produce friction in the transportation process and collision at the end of the throwing between materials and vibration surface. The phenomenon of the different doing work under the conditions of different working speed of vibration surface is used to explain vibration result in the decrease of friction between materials and vibration surface, which shows the antifriction mechanism of vibration and its application in vibrating conveyer.