Test piece fixing device for testing shot blasting strength of surface of pipeline

The invention belongs to the technical field of shot blasting strength test auxiliary tools and relates to a test piece fixing device for testing shot blasting strength on the surface of a pipeline. The device comprises a fixer body, a first end and a second end; the fixer body comprises a support body which is arranged in a rectangular shape and is provided with a plurality of test piece clamping holes penetrating through the thickness direction of the support body, test piece clamping screws which are detachably connected with the test piece clamping holes and are used for being matched with the support body and clamp the edge of a test piece, a first inserting body which is connected with the edge of the support body in the first width direction, and a second inserting body which is connected with the edge of the support body in the second width direction. According to the test piece fixing device disclosed by the invention, the test piece and a sample pipeline can be effectively, indirectly and axially co