Method of forming three-dimensional composite

A method of forming three-dimensional composite comprising steps of:

• (a) manufacturing at least one shaping member, wherein each of the at least one shaping member is made of flexible material, and said each shaping member has at least one orifice formed thereon;
• (b) fitting said each shaping member on each of at least one mold, wherein said each shaping member covers a peripheral wall of said each mold;
• (c) adhering at least on connection sheet on said each shaping member, wherein each of the at least one connection sheet is pre-formed in a predetermined shape and is adhered on said each shaping member so as to form each of at least one semi-finished product, and said each connection sheet has a substrate and an adhesive layer, the adhesive layer is located on a bottom of the substrate, and a melting point of the adhesive layer is less than the substrate;
• (c2) fitting an air barrier sleeve on said each semi-finished product, wherein the air barrier sleeve has at least one opening and is fitted on said each semi-finished product, a melting point of the air barrier sleeve is more than the substrate;
• (d) fixing said each semi-finished product in the a cavity;
• and
• (e) heating said each semi-finished product and vacuuming the cavity, wherein said semi-finished product in the cavity is heated until the adhesive layer of said each connection sheet melts, and the cavity is vacuumed so that a negative pressure forms between said each mold and the air barrier sleeve, hence the air barrier sleeve is drawn downwardly by the negative pressure so as to press said each connection sheet, and the adhesive layer penetrates into said each shaping member, thus connecting said each connection sheet with said each shaping member.