Hydrogel is a kind of hydrophilic polymer material, which can absorb a lot of water and form soft, transparent and elastic gel like material. The hydrogel tester is an instrument specially used to test the mechanical properties of hydrogel materials. It can measuretryWhen the hydrogel is stretched at different speeds, tensile strainsCyclic stretchingStress under conditions such as stretching temperature-Parameters such as strain curve, elastic modulus, and fracture strength. The hydrogel testing machine is of great significance in studying the relationship between the structure and performance of hydrogels, optimizing the preparation process of hydrogels, and developing new hydrogel materials.