The movement and force state of casting used sand in vibration type reclamation were simulated by distinct element method(DEM.The boundary work was shown by forward squeezing and the frictional work was shown by frictional interaction between sands.The influence of the several factors on the process of vabration type reclamation was simulated.The simulation results indicate that the effect of reclamation of used sand can be improved by using polygon cylinder,setting central cylinder,raising the frequency an...