We focuse on simulation principles and techniques of GNSS-R in sea surface wind field（SSWF） retrieval based on airborne remote sensing

and analyze the relationship among ocean wave spectrum

sea surface slope

wind speed and direction.We not only carry out a numerical simulation on the condition of various wind speeds and directions

receiver altitudes

and flight speeds

but also have completed a corresponding simulation software.The simulation results indicate that all the parameters above can affect the peak value and the trailing slope of the relative power waveform of the reflected signals from sea surface.Simulation study of this paper establishes a theoretical basis for the SSWF retrieval using GNSS-R.