Machining clamp structure

The utility model provides a machining clamp structure, which relates to the technical field of machining, and comprises a working table, two supporting tables are fixedly mounted at the top of the working table, movable threaded rods are rotatably inserted into one sides of the outer walls of the two supporting tables, clamping blocks are movably sleeved between the opposite ends of the two movable threaded rods, and the movable threaded rods are movably sleeved with the clamping blocks. The device comprises two clamping blocks, the inner surface walls of the two clamping blocks are movably sleeved with moving blocks, inserting grooves are formed in the tops of the two moving blocks, and extrusion plates are movably inserted into the inner surface walls of every two of the four inserting grooves, so that the front side and the rear side of a workpiece are extruded and fixed. And the movable block is driven to move towards the position of the workpiece through the thread transmission principle, so that the fr