Fixed battlefield information contains a large number of related terms with fast and efficient transmission, compression is conducive to rapid transmission of information, but some of the existing compression algorithm for war intelligence and compression effect is not ideal. This paper introduces the principle of LZW algorithm, based on the LZW algorithm increases the situation dynamic dictionary, repetitive encoder algorithm is improved. In a number of improvement on the basis of combining the advantage of FPGA in hardware implementation, obtained the good effect.