Abstract: Carbon fiber composites are widely used in aerospace and many other fields due to their excellent mechanical properties. However, due to their relatively poor electrical conductivity, specialized lightning strike protection design is required when applied to aircraft structural manufacturing. In current simulation studies on lightning strike protection for composites, fibers are commonly simplified as straight cylinders, neglecting the actual micro-bending phenomenon of fiber filaments. To investigate the effect of fiber micro-bending on lightning strike damage in composites, a multi-scale modeling research method is established. It constructs a micro-unit model of composites with curved fibers, calculates the equivalent material parameters of composites under different bending conditions, and conducts finite element simulations of lightning strike damage in composite laminates. Simulation results reveal that when fiber bending amplitude exceeds a critical value, the electrical conductivity perpendicular to the fiber direction significantly increases, the electric field distribution becomes more uniform, and both heat accumulation and resin pyrolysis are notably reduced. Mechanistic analysis indicates that when fibers bend beyond a certain degree, the significantly increased conductive pathways improve the material's thermal performance and enhance its resistance to pyrolysis, thereby mitigating lightning strike damage.