Die for casting parts with thin wall and large area complex curve

The utility model discloses a die for casting parts with thin wall and large area complex curve, which is characterized in that the die is composed of a male die (1) provided with concave-convex surface shape on the surface and female die (2) provided with die cavity, wherein the concave-convex curve shape on the surface of the male die (1) is in the same with the surface curve shape of the thin-wall complex curve part to be machined, the die cavity surface of the female die (2) is in the same shape with the concave-convex curve on the surface of the male die (1), a layer of plastic material layer (3) in the same thickness with the thin-wall complex curve part is covered on the die cavity surface of the female die (2) or the surface of the male die (1). Using the utility model to machine parts with large area, thin wall and complex curve, not only the machining cost is reduced, but also the machining period is shortened, and further the machining quality is ensured.