Clamping tool for grinding and polishing small-size sample

The utility model relates to the technical field of grinding and polishing of small-size intergranular corrosion samples, in particular to a clamping tool for grinding and polishing small-size samples, which comprises a clamping device and a fastening device, the clamping device comprises an L-shaped first clamping block, a plate-shaped second clamping block and a guide rail, the first clamping block comprises a first clamping plate parallel to the second clamping block and a transverse plate perpendicularly connected with the first clamping plate, the guide rail is fixedly installed on the transverse plate and perpendicular to the first clamping plate, and a guide rail groove is formed in the lower portion of the second clamping block and slides on the guide rail. A limiting structure used for limiting the moving direction of the second clamping block is arranged between the guide rail groove and the guide rail, the fastening device limits the clamping degree of the first clamping block and the second clampi