ing at the problem of ground-space slope reverse modulation wireless optical (FSO) communication under the influence of atmospheric turbulence, the optical intensity scintillation under the reverse modulation slant path link is studied based on the three-layer height spectrum model, and the probability density function expression of the atmospheric turbulence fading coefficient under weak turbulence is derived based on this formula, the average outage probability, average bit error rate and average channel capacity of the system are deeply studied, and the influence of factors such as zenith angle, turbulence intensity and receiving aperture size on the communication performance of the system are analyzed. The research results show that in the case of low signal-to-noise ratio and long-distance communication, the receiver aperture is appropriately increased, and the ground-space reverse modulation slant path wireless optical communication system can still maintain good communication performance. With the decrease of the zenith angle and the refractive index structure constant of the near-earth atmosphere, the influence of turbulence on the slant path communication link is obviously weakened.