For the phase-locked loop effect occured in sea surface’s simulation by using double-superposition method, sampling frequency of different wind speeds is selected according to the waves’ narrow-band spectral characteristics. Three-dimensional random sea-surface is simulated by using the method of frequency corresponding to the direction. The simulation results reflect sea-surface actually. Then the reflection, refraction and the total energy transmittance of the uplink laser that propagation through sea-surface are analyzed and simulated by Fresnel formula. The results show that the wind speed changing and incidence angle of uplink laser have a great effect on the energy transmission rate. Finally, the scattering effect of the uplink laser through sea surface is analyzed.