A comparative design was carried out on the aluminum alloy forming devices for the grid structures with equal-pitch spiral ribs，equal-helix-angle spiral ribs and geodesic spiral ribs on the conical section. The three-dimensional conical surface was developed into a plane， and the development law of the conical spiral was studied simultaneously. The three-dimensional aluminum alloy grid mold was converted into a planar silicone rubber grid mold， which was formed by planar casting and then attached to the conical surface， thereby further reducing the research and development costs. The design problem of the forming device for the conical composite grid structure was solved through the design of aluminum alloy and silicone rubber grid molds. Combined with the engineering application scenarios and the characteristics of the aluminum alloy male molds and silicone rubber grid molds for the three types of conical section grid structures， the selection and application methods for various grid molds were proposed. The problem of variable satellite interface dimensions is addressed by adopting shared technologies， which accelerate the production schedule， reduce costs and enhance the commercial competitiveness of the conical composite oblique grid satellite support. The designed and manufactured forming devices are applied to the forming of the corresponding composite structures， achieving excellent results， and pass the flight test verification and attained a complete success.