<p>Assessing the dynamic response of flexible rockfall nets under rockfall impacts is a nonlinear dynamic problem. Modelling rockfalls with realistic morphological features can help investigate the effects of their morphological characteristics on the dynamic response of flexible rockfall nets. This paper aims to establish a standardised process for reconstructing a computational model of rockfalls and to analyse the influence of rockfall morphology on the dynamic response of a flexible rockfall net. First, four morphological parameters, namely, the aspect ratio (AR), sphericity (SP), convexity (CO), and angularity (AN), are used to characterise the rockfall morphology. Second, a standardised processing procedure is proposed for the rockfall model, where differences in size and orientation are eliminated via translation, magnification and rotation. Third, the voxelisation method is used to transform the rockfall model into a sphere-based model suitable for numerical simulation. Finally, the dynamic response of a flexible rockfall net under impact conditions is investigated via sphere discontinuous deformation analysis (SDDA), with rockfall models exhibiting different morphological characteristics. The results show that an increase in CO and AN significantly benefits the local deformation of the flexible rockfall net and that an increase in SP inhibits the overall failure of the flexible rockfall net.</p>