In this article, the influence of pump symmetry on the dynamic drift of the beam in a large-aperture chip amplifier is introduced. The beam dynamic drift characteristics of two large-aperture slap amplifiers and amplification configurations are compared by the numerical simulation calculations, and a large-aperture high-profile pump based on a pulsed xenon lamp with a diameter of 37 mm and asymmetrical arrangement of multiple lamps is studied experimentally. The dynamic drift characteristics of the beam caused by the pump of the gain slap amplifier are studied. When the symmetry of the pump field of the neodymium glass sheet is about 1.038∶1, the pump-induced beam dynamic wavefront tilt PV value is about 0.98λ (6 sheets accumulation), and the dynamic drift angle of a single laser passing through a single neodymium glass plate is about 0.32 μrad in 375 mm beam aperture, which is well consistent with the result of the theoretical model. This can provide reference for the design of slap amplifiers with different pump configurations as well as the design of multi-path optical paths of laser devices and the design of spatial filter apertures.