The development status and trends of military and civil high bypass pressure ratio(BPR) turbofan engines for large airplanes has been summarized in the paper.In the aspects of strategical goals

importance and marketing foreground of the high BPRturbofan engines for national large airplanes engineering in China

the requirements

status and gaps of high BPRturbofan engines in China have been analysis briefly as well as the introduction of the overall engine scheme for the high BPRturbofan engines with the main key technologies for the engines.In terms of military and civil high BPRturbofan engines technologies

international cooperation

materials and techniques and test facilities

some suggestion and approach have been discussed for the technical challenges with the development of high BPRturbofan engines in China.