Small metal machining clamping device

The small metal machining clamping device comprises a bottom plate, a first vertical plate is welded to the left side of the upper end of the bottom plate, a second vertical plate is welded to the position, corresponding to the first vertical plate, of the upper end of the bottom plate, a limiting plate is fixed to the upper end of the inner side of the first vertical plate, and a square notch isformed in the front end of the inner side of the limiting plate. An arc-shaped notch is formed in the position, behind the square notch, of the inner side of the limiting plate, and a penetrating typefirst air cylinder is arranged on the front side of the upper end of the second vertical plate. The limiting plate is arranged, the square notches and the arc-shaped notches are formed in the limiting plate and can be placed according to the shape of metal and fixed through the corresponding limiting blocks, the sliding frame connected in a sliding mode is arranged, the position of the sliding frame can be adjusted accord