Clamp for high-smoothness surface treatment of sample

The utility model belongs to the technical field of equipment sample processing tools, and relates to a clamp for high-finish surface treatment of a sample, which comprises a convex base and a concave cover plate which are connected through a compression bolt, a processing through groove is arranged in the middle of the concave cover plate along the width direction, and upper clamping through grooves are arranged in the middle of the bottom surface of the concave cover plate on two sides of the processing through groove. A groove is formed in the top of the convex base in the width direction, lower clamping through grooves are formed in the positions, on the two sides of the groove, of the top of the convex base in the length direction, the lower clamping through grooves correspond to the upper clamping through grooves in position and size, and the lower clamping through grooves and the upper clamping through grooves form a long-strip-shaped through hole used for clamping a test sample. The concave cover plat