Application of composite primary structure has become a trend in large aircraft. This paper introduces the using of composite primary structure in large aircraft for the main commercial aircraft manufacturer

such as Boeing Co.

Airbus Co.

and COMAC

etc. Recently

the manufacturing technology of composite primary structure has been changed from the prepreg of manual placement and automated tape laying to automated fiber placement. The advanced liquid forming process of composite

as a kind of out-of-autoclave process

has been paid more and more attentions because of its huge potential that included complex-shaped and integral manufacture

lower cost of equipment

lower energy consumption and cost-cutting of manufacture.