Sample stretching clamp

The utility model discloses a sample tensile fixture which comprises two symmetrically arranged fixture bodies, and each fixture body comprises a first clamping part, a second clamping part located at one end of the first clamping part and a connecting rod located at the other end of the first clamping part; one or more first grooves for placing a first sample are formed in the outer surface of the first clamping part, one or more second grooves for placing a second sample are formed in the outer surface of the second clamping part, and a cavity for placing a third sample is formed in the second clamping part. According to the sample tensile fixture disclosed by the utility model, the first clamping part, the second clamping part and the cavity in the second clamping part are arranged, so that the tensile fixture can be used for simultaneously testing a first sample, a second sample and a third sample in three shapes, the application range is wide, and multiple groups of parallel test data can be obtained thr