Abstract Adding fiber filler is a classic strategy for plastic reinforcement, which is well worth applying to Digital Light Processing (DLP) 3D printing technology. Herein, this study evaluated the application of micro-size poly(p-benzoyl-p-phenylenediamine) (Kevlar) fiber in resin for stereolithography. The mixture of Kevlar fiber and resin has an acceptable viscosity. In the mentioned process, the resin was solidified by the projector beam (405 nm) in the Z-axis direction layer by layer. The results showed that the object could still be printed after the content of Kevlar reached 7 wt%. After UV light irradiation and thermal curing, the strength and Young's modulus of the composite are 1.79 times and 11.2 times higher than those of the pure resin. The wear resistance of the composite material is improved. In the single-layer exposure test, the addition of Kevlar makes the resin have a better resolution. Compared with other strategies using Kevlar fiber, it is shown that Kevlar fiber has potential application prospects in DLP 3D printing.