Abstract: This paper investigates the effect of the fixed-point pulse strike of droplets on the sputtering erosion of non-uniform sand by simulating raindrop sputtering tests. The experiments are conducted on four kinds of non-uniform sand with median particle size（1, 2, 3, 3.7mm） at four different slopes（0°, 15°, 25°, 35°） with 3.65 mm diameter pulsed droplets. By comparing the sputtering erosion process and the sputtering pit type, this paper has drawn the following conclusions: The effect of the pulsed droplets on the non-uniform sand slope surface is more obvious than that of the single droplet, and the droplets produce a certain “superposition effect” when striking continuously. The change of the slope of the underlying surface and the median particle size also has a significant impact on the sputtering erosion process and the sputtering pit type. The initial strike of droplets makes the particles unstable. With the continuous strike of droplets, the central particles are compacted to form a collapse, and the surrounding particles leap around under the action of side pressure and the impulse of droplet strike, and coarse particles are formed around the collapse to form loose deposits, and the coarsening of the underlying surface develops into a sputtering pit. As the slope increases, the stability of the slope surface deteriorates, the diameter of the pit opening of the sputtering pit becomes larger, the upper wall becomes steeper, the lower wall becomes slower, and the accumulation of particles at the lower pit lip increases, making it easier to destabilize and collapse. At the same time, the larger the median particle size, the stronger the shading effect on the fine sand, the greater the energy loss of droplets, the less energy used to destroy the original structure of the underlying surface, the more difficult it is to form sputtering pits.