Abstract: Many efforts had been made aiming at the issue of lower mechanical performance of domestic aramid paper composites, which made of meta-aramid fibers and fibrids. In the present work, the aramid paper composites were prepared with para-aramid (1414) chopped fibers and meta-aramid (1313) fibrids, abbreviated as 1414/1313 paper. The hot-pressing characteristics and strength properties of the aramid sheets under various temperatures were investigated. The variations of internal structure in aramid paper composites were characterized by using SEM and FTIR. The effects of hot-pressing temperature on interactions and inter-binding features between the fibers and fibrids were studied. The results show that a favorable bond feature between the chopped fibers and fibrids is formed when the papers were hot pressed at 280℃, 15 MPa for 6 min. A maximum tensile index of 212.2 N·m·g^-1 with paper porosity of 23.21% occurs, which may about twice that of the commercial T410 Nomex paper. In addition, the FTIR spectrum results verify that no new chemical bonds are formed with the increase of hot pressing temperature, but the significant strength increase of intermolecular hydrogen bond association, which is the main cause of paper mechanical properties improvement.