DHDF (dynamic homogeneous dataflow) is the kernel of most graphic programming platform. For the natural data-driven property, the dynamic homogeneous dataflow can not work properly with the event-driven operating system, which leads to two demerits: one is inefficiency in CPU using, the other is low respond speed and poor in real time performance. An ECDF (event triggered concurrent dataflow) model and its formal description are presented in this paper. Based on multi-thread and event-triggered mechanism, the real time performance and execution efficiency of dataflow-based system are improved. The experimental results of a test system prove that the event-driven concurrent dataflow can ameliorate the performance of dataflow-based system to a certain degree in most conditions comparing with the dynamic homogeneous dataflow model. ECDF model is also suited for the Reactive systems design, and high-speed burst-data flow processing especially.