Linear cutting positioning clamp

The utility model discloses a linear cutting positioning fixture, which belongs to the technical field of fixtures and comprises a base, two groups of positioning structures are symmetrically mounted at the upper end of the base, each group of positioning structure comprises a lower positioning seat and an upper positioning seat, and the lower positioning seat and the upper positioning seat are identical in structure. According to the utility model, when a cylindrical workpiece is encountered, the lengths of the positioning columns on the upper positioning seat and the lower positioning seat entering the mounting shell are different, some positioning columns continue to move after the depths of the positioning columns entering the mounting shell reach a marking line, and at the moment, the positioning columns push the supporting sleeve to move in the sleeve; after the workpiece is stably clamped, the coil sleeve is electrified to enable the positioning column to generate magnetism, so that the limiting head e