Fixture capable of avoiding repeated positioning and stably fixing workpiece

The utility model discloses a fixture capable of avoiding repeated positioning and stably fixing a workpiece, which comprises a lower base plate and a fixture suite, the fixture suite is arranged at the top of the lower base plate, and the fixture suite comprises action blocks which are symmetrically arranged and fixed at the top of the lower base plate. Plane references used for placing workpieces are arranged in the middles of the tops of the acting blocks, pressing plates are connected to the positions, located on the two sides of the plane references, of the tops of the acting blocks through cushion blocks, and pin holes are formed in the two ends of each pressing plate. The plane reference is arranged on the clamp and corresponds to the bottom plane of the workpiece, the center positioning pin, the angular positioning pin and the two through holes of the workpiece are utilized, the workpiece is installed in the clamp through the plane reference and the positioning mechanism, the workpiece is supported th