The invention discloses a workflow mechanism-based concurrent ETL (Extract, Transform and Load) conversion method. By using a workflow technology and a multi-thread concurrent technology, concurrent execution of a plurality of ETL tasks of an ETL workflow and concurrent execution of a plurality of ETL behaviors in a single task are realized. When a plurality of ETL workflows are executed simultaneously and more parallel branches are available in the ETL workflows and the ETL operation, the execution efficiency can be obviously increased. At the same time, according to the method, cluster distribution processing is constructed, and parallel ETL data extraction engines are constructed by a parallel pipeline technology, so that the extraction efficiency of data can be greatly increased, and the parallel processing problem of multiple data flows and the bottleneck problem of conversion processing are solved.