The invention discloses a shaping mould cup with built-in elastomers. The shaping mould cup comprises a mould cup body formed by laminating upper-layer cotton and lower-layer cotton, wherein bowl-shaped cup bodies are arranged on the left and right of the mould cup body, each bowl-shaped cup body is provided with a built-in elastomer used for supporting and being sheet-shaped, and the elastomer is clamped between the upper-layer cotton and the lower-layer cotton; each elastomer is provided with an arc-shaped base part corresponding to the lower bowl periphery of the bowl-shaped cup body, and the arc-shaped base part extends towards the inner side from the outer side of the bowl-shaped cup body. Compared with the prior art, the shaping mould cup has the advantages that the elastomers are adopted for replacing the traditional steel rings, good supporting, gathering and shaping effects are achieved, and the shaping mould cup is particularly suitable for a bra with thin cups. The invention further discloses a manufacturing method of the shaping mould cup. The manufacturing method comprises the following steps: (1) carving; (2) pre-hot-press molding; and (3) compression molding. The manufacturing method is concise in technology, relatively high in production efficiency, and low in cost, and is particularly suitable for mass production.