Abstract: In order to study the influence of explosive welding parameters on the interface waveform, the two-dimensional numerical simulation of explosive welding was used in this paper.The numerical simulation of tantalum/304 stainless steel was carried out, and the interface waves under different collision angles and collision speeds were obtained. By outputting the waveform diagram at the simulation interface, it can be observed that the steel is elongated and strongly bent at the vortex in the detonation process. The wavelength and amplitude of the wave are measured, and it is found that when the collision velocity is constant, the specific wavelength at the collision angle of 12.2° < the specific wavelength at the collision angle of 14.1°< the specific wavelength at the collision angle of 16.4°; when the impact angle is fixed, the interface wavelength and amplitude at the impact velocity of 633 m/s are smaller than those at the impact velocity of 735 m/s; the numerical value in the horizontal direction of velocity is in good agreement with the wavelength value, and the numerical value in the vertical direction of velocity is in good agreement with the amplitude value. The results show that obvious cleavage fracture characteristics are found at the interface and the steel side near the interface. The specific wavelength at the interface is positively correlated with the collision angle; the greater the collision speed, the greater the interface wavelength and amplitude; the horizontal component of velocity determines the wavelength value, and the vertical component of velocity determines the amplitude value.Highlights: (1)Effect of collision angle and velocity on interface waveform is studied by combining smooth particle hydrodynamics method and using single parameter variation method.(2)The influence of horizontal component and vertical component of velocity on interface waveformare studied.