The combined cooling method represented by active-passive hybrid cooling was an efficient cooling technique for combustion chambers.Nevertheless， this cooling mode was subject to numerous influencing factors and intricate internal interactions.This paper aimed to investigate the influence of composite flame tubes on film cooling performance under an active-passive hybrid thermal protection configuration integrating composites and film cooling.A physical model and numerical method for film cooling on composite plates were established， and simulations were conducted by varying the film cooling inlet angle and the fiber orientation of fiber-toughened composite materials.The results show that with the increase of x，the comprehensive cooling efficiency drops significantly at large fiber angles， whereas the cooling performance degradation is relatively mild at small fiber angles.Within a certain region downstream of film holes，the comprehensive cooling efficiency corresponding to large fiber angles decreases sharply，while the cooling performance degradation at small fiber angles remains relatively moderate.A smaller inlet angle leads to weaker influence of fiber orientation on cooling performance downstream of film holes.The difference in cooling performance upstream of film holes caused by fiber angles is more pronounced than that downstream，and the impact of fiber angles is far less significant than that of inlet angles.