The Co-flow Jet technology, as a new type of integrated flow control technology, has shown potential in lift control,drag Control, and stall control. Due to the relatively short development time, the correlated studies are still under the primary stage,but it has already shown its unique advantages . This paper summarizes the research of existing CFJ technology, discusses the mechanism of this technology and its applications on various aircrafts, and analyzes key technologies which affect the performance of this technology，such as fluid analysis technology, component layout strategy, design of flight control system, aircraft integrated design method.