The fade statistics of satellite-to-ground laser link is modeled for the gamma-gamma distribution of the irradiance scintillation subjected to atmospheric turbulence.Probability of fade,mean fade number and mean fade time′s statistical characteristic is researched.The analysis is done with different zenith angle.The result of research shows:both decreasing zenith angle and increasing detection sensitivity of receiver can reduce probability of fade and mean fade number evidently,but only shorten a little of mean fade time,and the mean fade time of satellite-to-ground laser link is on the order of milliseconds.