The real-time judgment and screening of the dangerous parts of the whole structure is always one of the very difficult problems in the process of structural strength verification. As an important monitoring index in the static test of aircraft structure, the identification and judgment of the buckling position determines the degree of control of the field test personnel on the overall test. In the static strength test of aircraft structure, the test risk is more and more difficult to control, and unexpected structural failure occurs from time to time. In order to realize the identification of structural buckling parts accurately and efficiently, a buckling real-time detection system was designed and realized. The system realized real-time acquisition of collected data based on timer technology, and completes buckling position judgment based on nonlinearity, and finally visualized the buckling parts through two-dimensional and three-dimensional forms. The system has been applied in the test site, and the effect is remarkable.