Currently， there is limited research on the tribological properties of frictional pairs composed of C_f/C-ZrO₂ and C_f/C-Si₃N₄， particularly regarding the influence of temperature on their friction behavior. Therefore，the effect of initial temperature on the tribological performance of these two pairs were investigated in this work. Friction tests were conducted using pin-on-disc configurations where C_f/C composites were paired with zirconia （ZrO₂） and silicon nitride （Si₃N₄），respectively. The variations in friction coefficient， wear loss， and friction interface morphology under initial temperatures ranging from 200℃ to 700℃ were systematically analyzed.The results indicate that below 400℃， the average friction coefficient of the C_f/C-ZrO₂ pair is lower than that of the C_f/C-Si₃N₄ pair， with both pairs exhibiting mixed wear mechanisms dominated by abrasive wear and adhesive wear. Above 400℃， the average friction coefficient of the C_f/C-ZrO₂ pair surpasses that of the C_f/C-Si₃N₄ pair， and the wear mechanism transitions to a combination of abrasive wear and oxidative wear. Under all tested temperatures， the wear rate of the ZrO₂ disc is consistently lower than that of the Si₃N₄ disc. As the initial temperature increases， the oxidative wear of the C_f/C pin intensifies， leading to a gradual rise in wear rate. When the initial temperature exceeds 800℃， the C_f/C composite fails to maintain its stable macroscopic woven structure， undergoing thermal oxidation and structural degradation.