Positioning clamp

The utility model discloses a positioning clamp which comprises a bottom plate, a main frame is arranged on the bottom plate, a plurality of sliding grooves are formed in the surface, facing the main frame, of the bottom plate, the sliding grooves are perpendicular to different side edges of the main frame respectively, a limiting part used for limiting movement of a workpiece is movably installed on each sliding groove, a first through hole is formed in each side edge of the main frame, and a second through hole is formed in each side edge of the main frame. A movable rod penetrates through the first through hole, and the end, arranged on the inner side of the main frame, of the movable rod is connected with the limiting part. The utility model solves the problem that the existing clamp matched with the silk-screen printing tool can only position workpieces with specific sizes and cannot meet the requirements of ceramic workpieces with various sizes. 本实用新型公开了一种定位夹具，包括底板，底板上设置有主框，底板面向主框的表面上开设有多个滑槽，多个滑槽分别垂直于主框