The Vetiver (Vetiveria zizanioides) micro/nano fibrils (VFs) were prepared by high intensity ultrasonication (HIUS). The relative crystallinity, the distribution of diameters and morphologies of VFs were investigated by wide angle X ray (WAXD), laser diameter instrument, optical microscopy and scanning electron microscopy (SEM), respectively. The micro/nano fibrils were used to modify melamine formaldehyde resin (MF) and the property of abrasion resistance of MF before and after modification were evaluated. It showed that when filling with 15% of VFs, the abrasion got the minimum value, i.e. the abrasion resistant was best.