Testing device for stress corrosion three-point bending test

The utility model relates to a testing device for a stress corrosion three-point bending test. The testing device comprises a testing clamp, the test fixture comprises a fixture body, a test assembly and a loading assembly. A test cavity is formed in the clamp body, and at least two stress pieces are arranged in the test cavity; a to-be-tested sample is strip-shaped and is horizontally placed in the testing cavity, and two ends of the to-be-tested sample are respectively placed on the two stress pieces; the testing assembly is in contact with the middle part of the sample to be tested; the loading assembly moves close to or far away from the test cavity in the axial direction of the loading hole and acts on or does not act on the middle part of the to-be-tested sample, three-point stress of the to-be-tested sample is realized by combining the stress parts at the two ends, the test assembly is further used for measurement, and the test accuracy is improved in a mechanical mode. The interference of human factor