The invention relates to the technical field of channel encoding, in particular to Polar code encoding cooperation based on inverse code word Plotkin construction and information bit re-hibernation. The encoding cooperation based on Polar codes is researched from the aspects of sub-code word construction way, performance optimization and the like. Plotkin construction is performed on non-system Polar inverse code words from the aspect of sub-code word construction to obtain an encoding cooperation method based on inverse sub-code words, so that the performance of non-system Polar code encoding cooperation is improved remarkably under a fading channel. From the aspect of performance optimization, an information bit re-hibernation mechanism is introduced by analysis of a decoding feature of the inverse sub-code word, so that the cooperation benefit is increased; and then, encoding cooperation based on non-system Polar codes is extended to encoding cooperation based on system Polar codes. The method and the system have the beneficial effects that the inverse code word Plotkin construction, the information bit re-hibernation and the system Polar codes are introduced, so that the performance of the Polar codes is improved remarkably compared with the prior art under a slow fading channel.