I.Introduction Dynamic data flow refers to an ordered time series composed of a large number of continuously arriving, potentially infinitely long, and rapidly changing data. The purpose of dynamic data flow trend analysis is to extract trend change information and provide early warning, status assessment, and decision support for monitoring objects. Due to the characteristics of the dynamic data stream itself, it is required that the data stream analysis algorithm has high computational efficiency, meets real-time or near-real-time performance, and consumes less computing resources [1].