The invention provides a device used for mechanical property testing of a high-temperature superconducting strip, and includes a four-lead control device (1), a strip critical current testing frame (2), a strip turning radius testing frame (3) and a strip stretching stress testing frame (4). The device has the following advantages: 1. through the device, accurate measurement of almost all electrical and mechanical properties of a short sample of a strip can be completed, including a turning radius, stretching stress, delaminating stress and the like, and the device has complete functions and is convenient to use; 2. equipment is complete in design, is practical and humanized, a person can seat on a table surface to carry out processes of welding, testing and the like, and the whole process is easy; 3. a square hole plate mounted on a table top can accommodate various test sample holders, screws, tools and the like, and is convenient and practical; and 4. the test sample holders can reasonably and effectively support measurement of samples.