Abstract: In order to study propagation properties of partially coherent flat-topped beam array(PCFT) in the oceanic turbulence, based on the extended Huygens-Fresnel principle and Wigner distribution function, combined with the spatial power spectrum of oceanic turbulence, analytical formulas of M2 factor,effective radius of curvature and Rayleigh range of PCFT beam array in oceanic turbulence were obtained and the relationship between M2 factor,effective radius of curvature and Rayleigh range of PCFT beam array in oceanic turbulence and the coherent width, temperature change, salinity change, dissipation rate of turbulent kinetic energy, dissipation rate of mean-squared temperature were analyzed and discussed. The results show that, under the same condition, when the propagation distance is more than 400m, compared with the partially coherent Gaussian beam, the partially coherent flat-topped beam and the partially coherent Gaussian beam array, PCFT beam array is less affected by the oceanic turbulence and the propagation characteristic is more stable. The results have certain reference value for selecting the suitable beams propagating in oceanic turbulence.