Abstract: Here were studied the variation of the welding interface of thick laminated TA1/304 composite plate at different positions from the initiation end along the detonation wave propagation direction. The variation of the composite interface was analyzed as a whole through metallographic analysis and performance detection, and the dynamic change of the interface was systematically studied during the detonation wave propagation process. The results indicated that along the propagation direction of detonation wave, the welding interface morphology experienced the dynamic change process of no wave, wave-forming, amplitude and wavelength increasing, wave stabilizing and wave vanishing. With the change of interface morphology, the shear strength first increased and then stabilized, and finally significantly decreased at the position opposite to the initiation, with the lowest shear strength of 230 MPa. In the range of 300~400 mm from the detonation edge, the interface wave was stable in shape, with the wave amplitude ratio of 0.22 and the shear strength of about 450 MPa.