Online real-time compression system and compression method thereof during communication of early warning and assessment system

The invention discloses an online real-time compression system and a compression method thereof during communication of an early warning and assessment system. The online real-time compression system comprises a cache module and a frequency division unit, wherein the cache module is respectively in signal connection with a self-adaptive step length unit and a predictive filtering module; the self-adaptive step length unit is in signal connection with a sampling unit, the sampling unit is in signal connection with an encoding module, and the predictive filtering module is in signal connection with the encoding module; the frequency division unit is in signal connection with a time scale module, and the time scale module is in signal connection with the encoding module; and the encoding module is in signal connection with an OUT interface module. The invention provides the online real-time compression system and the compression method thereof during the communication of the early warning and assessment system, so that the correctness and integrity of data are ensured; and as only messages associated with communication failure are compressed and transmitted, the network transmission data volume is greatly reduced, and the data transmission rate and the failure processing efficiency are increased.