Abstract: In the study, SH wave propagation in transversely isotropic nanocoated fiber reinforced composites was investigated. Based on the Gurtin-Murdoch surface elasticity theory, the effective phase velocities, attenuations and, dynamic effective elastic constants of wave propagation in composites were obtained by using the generalized self-consistent model and by multiple scattering methods. The effects of the geometric size, of material constant and, of interfacial properties of the coating on the dynamic effective mechanical property of the composites were discussed. The results show that the surface effect has a significant influence on the dynamic effective mechanical properties of the composites. The smaller the fiber radius, the larger the coating wall thickness and, the higher the wave frequency, the more obvious the surface effect is. Particularly soft or particularly hard coatings will mask the role of the fiber modulus in the composites. The influence of coating interface properties decreases with the increase of coating modulus.