This product is a self-curing resin containing a triazine ring and an aromatic heterocycle, representing a novel class of high-performance composite resin matrices. During the curing process, it exhibits high crosslinking density, produces no volatile small molecules, has low shrinkage, and demonstrates outstanding thermal-oxidative stability, high carbon yield, as well as excellent mechanical properties, ablation resistance, and flame retardancy. When combined with carbon fiber composites, it exhibits superior heat resistance, good thermal aging performance, and bending and shear strength, ranking at the forefront of thermosetting resins. It is suitable for the requirements of existing composite material processing equipment and techniques, including winding, vacuum bag molding, reaction injection molding, and other processing methods, ensuring dimensional stability of the products.