Abstract: Plate bonded structures are widely used in aerospace and vehicle manufacturing and other industrial fields due to the characteristics of light weight and uniform stress distribution compared with the connection methods of riveting, screw, welding and others. The bonding strength degradation and weak bonding will affect the reliability and security of bonded components, so it is very important to test them. The nonlinear ultrasonic guided wave is sensitive to the microstructure change of materials and can be used to detect the bonding strength degradation of bonded components. In this paper, the nonlinear ultrasonic guided wave is used to test the aluminum alloy - epoxy resin - aluminum alloy plate bonded components, which are prepared through the different curing processes to simulate different bonding strengths. In the experiments, by detecting the nonlinear ultrasonic guided wave propagating in the components and then calculating the ultrasonic nonlinear parameters, the variation trends of ultrasonic nonlinear parameters under different curing processes are obtained. The corresponding bonding strengths of components are measured by tensile tests, and then the relationships between ultrasonic nonlinear parameters and bond strength are established. The experimental results show that the greater the bonding strength, the smaller the nonlinear parameters of the ultrasonic guided wave. So, the nonlinear ultrasonic guided wave can be effectively used to detect the bonding strength of plate components, providing an effective method for industrial testing of the bonding strength of plate components.