Abstract: In order to describe the spatial color information processing mechanism of human color vision, the characteristic of lightness spatial frequency transfer in the opposition color space CIELAB was measured. Apsychophysical experiments platform was established. The five lightness values on the L-axis of CIELAB were chosen as the color sample. To each lightness value, a series of images were made, which lightness contrast was modulated with sinusoidal frequency changes. The experiment selected the normal visual observer, collected those contrast sensitivity data of the five color samples corresponding to the twelve spatial frequencies. Correlation analysis shows that the observed values of the single color sample between the different spatial frequencies are non-linear correlation; with the numbers of lightness samples increased, the linear correlation was enhanced. Therefore, the spatial frequency transfer characteristic of the human lightness visual was described by linear model. The spatial frequency transfer nature of human lightness visual can be characteristic with three spatial frequency tuning curves. The spatial frequency tuning curves has different frequency and different peak, which describe the different spatial frequency receptive fields of the human visual system.