<p>Baffles is an effective means of preventing and controlling rock avalanches, but the blocking performance of particle splashing in rock avalanches is not yet clear. And the particle shape has a significant impact on the dynamic characteristics of particle splashing. This study reviewed the research and application of baffles in avalanches, debris flows, and rock avalanches and adopted Discrete Element Method (DEM) software to conduct numerical simulation experiments, comparing the motion characteristics and energy evolution of particle splashing in rock avalanches with various shape particles under baffles protection, analyzing the motion mode of particle splashing, and assuming the internal mechanism of shape affecting particle splashing. The results showed the splashing particle mass, peak particle velocity, maximum splashing distance, and average splashing height of particles with different shapes are roughly linearly and negatively correlated with the particle shape factor with the maximum difference of 2166.0, 25.2, 98.5 and 10.2% respectively, while the relative energy consumption of particles during the sliding motion is roughly linearly positively correlated. There are two modes of particle splashing, inter-particle collision and deposit body collision, changing the motion direction and velocity of splashing particles. The differences among the splashing motion characteristics of particles with different shapes result from the distinct collision modes induced by the collision angle, velocity, and spin, which can influence the direction and velocity of particles after collision. Based on our previous studies in baffle-net structures, the optimal engineering height of protective net was confirmed as 0.94 times of baffle height for the interception of particle splashing in rock avalanches reducing 86.5% splashing particles than the baffles with the protective net of 0.5 times baffle height, as reference for particle splashing prevention.</p>