An integral thermo-press complex brassiere cup structure. The structure includes an external lining body, an internal lining body, a bag, a bag covering layer coupled on the surface of the bag made of a soft poor thermal conductor, and a material adhering layer disposed at the attaching surface of the internal and external lining bodies. The material adhering layer adheres the surface of the bag covering layer at an appropriate position between the internal and external lining bodies, and places both internal and external lining bodies into a high-temperature thermo-press mold for an integral molding process. The heat produced by the high-temperature mold is conducted through the internal and external lining bodies and delayed or blocked by the bag covering layer as to weaken the heat conducted to the bag.