As the reinforcing phase of the composites， the preform determines the performance of the composites. The performance of the precast often depends on the spatial structure of the yarn. To reflect the spatial configuration and micro-geometric structure of the yarn inside the fabric， through the discretization of the yarn， the weaving process is simulated by numerical simulation and simulation methods. We review the progress on digital element method simulation of the weaving process of composite preforms. In terms of micro-geometric structure， this paper details the development process of digital element method research from theory to application and introduces the advanced digital element modeling method. It points out that the current model is idealized for the digital element method to simulate the textile process， and does not consider the bending stiffness of the fiber， the air damping effect and the energy loss caused by lateral compression， etc. This paper also points out that the digital element method can be further optimized in future research and parametric modeling can be realized， and that the deformation mechanism of the fiber bundle is studied to obtain a more realistic micro-geometric structure model.