The Characteristics of aerial color infrared film image of Crops and their stability have been analysed in this paper on the basis of measurement of aerial color infrared film density and terrain spectra combined with synchronous suruey of ground truth, The results are as follows:1. Because of the diversity of phonological reasons and communities, there exists a quantitative difference in spectral reflectances of various crops, which makes (Yellow/Cyan) the difference in density ratio of color infrared posi...