Micro-welding-spot creep life testing device and using method

The invention discloses a micro-welding-spot creep life testing device and a using method thereof.The micro-welding-spot creep life testing device comprises a supporting assembly, a clamping assemblyand a measuring assembly, wherein a base, a lower supporting frame and an upper supporting frame of the supporting assembly are connected in sequence, a first clamp holder and a second clamp holder ofthe clamping assembly are slidably connected with the upper supporting frame and the lower supporting frame respectively, a hanging ring of the measuring assembly is installed on the second clamp holder, a liquid weight is connected with the hanging ring through a hanging rope, the testing system is installed on one side of the base. A test sample is fixed by means of the first clamp holder and the second clamp holder, then the liquid weight with preset weight is hung, and after the test sample is broken, the liquid weight triggers an infrared sensor in a test system to obtain the creep lifeof the test sample. The mic