In this paper, taking the common engineering accumulation with structure in field investigation as the research background, two test materials including structural engineering accumulation and control group were designed (the control group is engineering accumulation without structures, which will be referred to as structure and accumulation for short in the later paper). Using the method of indoor rainfall simulation, the effects of rainfall intensity and rainfall field on slope runoff erosion of structure and accumulation were studied. The results show that:(1) the initial production duration decreases with the increase of rainfall intensity and rainfall field times, and the structure can delay the initial production duration, which is related to the soil characteristics and underlying surface characteristics of the structure; (2) The average runoff rate and average velocity increase with the increase of rainfall intensity and rainfall times. The average velocity and average runoff rate of the accumulation are 1.11~1.22 and1.11~1.37 times that of the structure, respectively. The time for the rapid increase and stabilization of the velocity and runoff rate of the structure is earlier and shorter than that of the accumulation; (3) The contribution rate of rainfall intensity to erosion rate, velocity and runoff rate is large, and the rainfall times is negatively correlated with erosion rate. Under all conditions, the erosion rate of structure is greater than that of accumulation, and the erosion rate and total erosion amount are 1.03~2.15 and 1.36~2.63 times of accumulation; (4) Runoff power can better describe the erosion dynamic process of structure and accumulation. The critical runoff shear force and runoff power of structure erosion are less than those of accumulation.