Polymer-base advanced composites have been widely used in aerospace industries. Low cost production of composites airframe structure is the burning issue of today in aerospace industry at home and abroad. This paper gives a summarized account of effective approach for reducing cost in engineering view. They are： enhance allowable strain value through modifying toughness of resin as matrix of composite, realizing integration of structure as could as possible, and using technology of resin infusion and electron beam curing.