Abstract: In this study, the self-made hybrid aramid papers were prepared with domestic para-aramid chopped fibers, meta-aramid chopped fibers and meta-aramid fibrids. The inter-binding features between the fibers and fibrids and crystalline properties of self-made hybrid aramid paper and Nomex T410(0.13 mm)paper were observed by SEM and XRD. The heat resistance properties of papers were also examined by TGA. The mechanical and dielectic properties were studied by comparison with the self-aramid hybrid paper and Nomex T410 paper, and correspondingly the hybrid effects of different chopped fibers on aramid paper were clarified. The results show that the paper properties of tensile strength, tearing index, crystallinity and heat resistance of the self-made hybrid aramid papers increase dramatically with the content increasing of para-aramid chopped fibers in sheets, however, the dielectric strength of papers increases at the beginning of chopped fibers hybriding and then decreases. When the hybriding ratio is 2:2, a favorable inter-bond features between the chopped fibers and fibrids is alike that of Nomex T410 paper, and mechanical and dielectic properties are close to that of Nomex T410 paper. The tensile index of self-made aramid paper is 130.4 N·m·g^-1, better than that of the Nomex T410 paper which is 111.1 N·m·g^-1 in machine direction and 56.2 N·m·g^-1 in cross direction. The tear index is 32.6 mN·m²·g^-1 which is between the machine direction(37.6 mN·m²·g^-1) and cross direction(23.6 mN·m²·g^-1) of Nomex T410 paper. The maximum value 26.5 kV·m^-1 was gained at the hybriding ratio of 2:2, which was very close to 27.0 kV·m^-1 of Nomex T410 paper. The degrees of crystallinity of the two papers were 34.84% and 15.71%, respectively. The initial decomposition temperatures are 430.6℃ and 435.1℃, and their mass loss at 780℃ are 42.8% and 39.1%, respectively, which indicates that aramid papers have stable heat resistance properties.