This paper constructs a realistic three-dimensional scene of maize

and develops a coherent scattering model to simulate the polarimetric Synthetic Aperture Radar（SAR）data by analyzing the structure characteristics of maize

especially considering the relative spatial position and orientation of maize leaves.The multi-angle

multi-polarization backscattering coefficients dataset acquired from the scatterometer are compared with that calculated from the simulated polarimetric SAR data

showing that the amplitude information simulated by the model is valid.The HH-VV

HH-HV

and VH-VV phase difference of the simulated data are analyzed

showing that the simulated phase information is valid.Besides

Polarization response method and Cloude H-α classification method are applied to validate the simulated PolSAR data from the viewpoint of scattering types.