Processing positioning fixture

The utility model discloses a processing positioning fixture which comprises a clamping mechanism, wherein the clamping mechanism comprises a base and a clamping block of a clamping workpiece, the base is provided with an upper surface and a front surface adjacent to the upper surface, the base is provided with a groove, the groove part penetrates through the upper surface and the front surface; one surface of the inner side of the groove is inclined relative to the bottom surface of the groove; the groove is provided with an opening for the clamping block to enter in the direction of the front surface of the base; and a slot matched up with the bottom edge of the opening is arranged on the clamping block. With simple structure and convenience in operation, the processing positioning fixture provided by the utility model can be used to rapidly positioning the semifinished product of the workpiece in the workpiece processing procedure and stably positioning the semifinished product of the workpiece in the fixt