Grinding instrument

The utility model discloses a grinding instrument which comprises a base, a drive assembly, a vibration assembly and a clamp assembly, wherein the drive assembly and the vibration assembly are arranged on the base; the clamp assembly is driven by the vibration assembly to generate vibration and clamps a tissue sample; a plurality of transport bolts are arranged on the base; each transport bolt comprises a stud with a thread; four supporting blades are outwards and uniformly arranged on the stud; friction layers are arranged on the ground contact surfaces of one pair of the supporting blades; tooth layers are arranged on the ground contact surfaces of another pair of the supporting blades; an anti-vibration spring is arranged on each supporting blade; the upper end of the anti-vibration spring is in contact with the surface of the base when the transport bolt is screwed. According to the grinding instrument, the transport bolts are added for protecting the instrument during transportation; the supporting blades with the friction layers are used for increasing friction on a smooth surface to prevent the instrument from moving during transportation; the supporting blades with the tooth layers are used for improving stability on the slightly soft ground to prevent the instrument from moving during transportation.