This paper built up the reflectance relationship between MWIR and solar reflectance bands based on Fresnel’s law. VIIRS (Visible Infrared Imaging Radiometer) mid-infrared band (3697μm) has been used as the reference standard to validate the four solar reflectance bands (0.672、0.862、1238 and 1.602 μm) on sea surface sun glint regions. Finally the uncertainties of this validation model were analyzed. The results show that the uncertainties of the four solar reflectance bands are 3.8%、3.9%、4.1%、4.1%, respectively. Therefore, the model proposed in this paper can be used for optical inter bands cross validation.