Spot welding sample preparation test system and clamping device

The clamping device comprises a clamping platform and a clamping foundation, the clamping platform comprises an upper platform and a lower platform which are arranged in the vertical direction, and each of the upper platform and the lower platform comprises a main body section and a clamping section which are arranged in the horizontal direction. The clamping platform is used for clamping a sample piece, meanwhile, the clamping sections and the main body sections of the upper platform and the lower platform are used for clamping the other end of the sample piece in the vertical direction, and the clamping stability is improved; welding holes are formed in the upper platform and the lower platform, a spot welding machine can conveniently weld and prepare a sample piece, the clamping platform is adopted for clamping the sample plate to prepare the sample piece, the preparation consistency of the sample piece is improved, and a powerful guarantee is provided for smooth proceeding of subsequent tests; the locking