With the rapid development of the civil transportation, there are more and more attentions paid on aviation noise in the whole of the world. As one of the important airframe noise sources, the high lift noise became a puzzle because of the complexity of the flow and the multiformity of the source. The European and American made a mass of research. The development of mechanism and the reduction measure of the high lift noise is summarized and the thought and requirement of the industry about the aerodynamic and aeroacoustics design of the high lift is referred in particular.