Abstract: Triboelectric nanogenerator (TENG), an emerging technology that can convert mechanical energy into electrical energy, provides a new solution for the energy supply of smart wearable devices. However, the low charge density and low output power of traditional wearable TENGs still need to be solved urgently. In this study, a high-performance triboelectric textile is constructed using barium titanate (BaTiO₃) and two-dimensional transition metal carbide and nitride (MXene) as fillers for tribo-positive and negative materials, respectively. With the help of the ferroelectric effect of BaTiO₃ and the interfacial polarization effect of MXene, two microcapacitors are formed, which promotes the corresponding increase in the dielectric constant of the tribo-positive material (polylactic acid, PLA) and the tribonegative material (polyvinylidene fluoride, PVDF), thereby improving the output performance of triboelectric textiles. The research results show that when the BaTiO₃ doping amount is 6 wt% and the MXene doping amount is 0.10 wt%, the output power of the triboelectric textile is as high as 99 W/m². The output voltage is 1600 V and the short-circuit current is 50 μA, which are 2.7 times and 3.6 times higher than those of the pure PVDF-PLA system, respectively. At a fixed tapping frequency, 480 light-emitting diodes (LEDs) may be lit up and can supply the normal operation of the electronic watch. The above results indicate that the PVDF/MXene-PLA/BaTiO₃ system effectively improves the output performance of traditional TENG and has good application prospects.