Only 2 cases that the aircraft parts made by metal additive manufacturing have been authenticated by profes-sional authority worldwide. On the contrary

additive manufacturing parts made by polymer additive manufacturing have been used about 20 years long formally by Boeing Airplane

the cumulative total of more than 100000 units. Deeply integrating the additive manufacturing technology and aviation industry

making overall planning and do the top-level design well

attaching equal importance to both polymer and metal additive manufacturing technology to make aircraft parts directly

these are the key point to promote healthy and sustainable development of additive manufacturing industry .