or discussing the ground information acquisition mode of the spaceborne imaging spectrometer, this paper applies the optimal linear predictive compression technique in combination with the Huffman hige-efficiency coding method to achieve the goal of strict information-preserving compression for the spectral and spatial composite data of the spaceborne imaging spectrometer. In this paper, the basic principle,system realization and the corresponding experimental results and conclusions of the onboard real-time data compression technical scheme for the spaceborne imaging spectrometer are given.