The multiple-beam propagating technique is one of the effective ways to mitigate the effect of atmospheric turbulence. The influence of atmospheric turbulence on multiple-beam atmospheric laser communication and the characteristics of optical intensity fluctuation after the multiple beams passing through atmospheric turbulence are analyzed theoretically. Then a new channel model of multiple-beam laser propagation through atmospheric turbulence is put forward applying the method of statistical analysis. The model is developed with 1) range z, 2) number of laser beams n, 3) laser transmitter spacing St, 4) receiver aperture Dr as variables. The model is validated by the experimental results in related reference. The results show that the multiple-beam approach with a proper aperture (Dr?恙?0) receiver and transmitter spacing (st≥λz) is a very effective way for intensity fluctuation reduction induced by turbulence, thus reduces the bit-error-rate of the atmospheric laser communication system. And the intensity fluctuation will provide a good match to log normal distribution with multiple beams.