Abstract: Enhancing students’ iterative and innovative abilities through practical teaching is an effective means. Amalgamated the progressive scientific research achievements with innovative teaching content within vocational training, integrated the talent cultivation objectives and engineering practice standards for higher vocational engineering education, and a biaxial tensile testing device for hyperelastic thin film materials was suffered iteratively improved. Through a detailed analysis of the initial structural functionalities, the PDCA cycle has been employed to iteratively refine the stretching methodology, mechanical architecture, control system, and detection techniques, thereby establishing a “trinity” iterative innovation training platform. The performance testing of hyperelastic thin film materials completed on this platform has achieved higher accuracy, meeting the training requirements of students’ iterative innovation ability, and providing useful references for engineering practice applications such as material stretching and testing.