The structure design，part processing，assembling difficulties and solutions of compound die for the stator sector piece which could be cut on a full automatic line in some wind driven generators were introduced.The questions of scrap cutter being difficult to be installed on the molding machine，rapid aligning when install the mould and convenient feeding were effectively solved by unique waste cutting device, rapid positioning apparatus and the lower mold fixing device .The practical results show that the die completely meets the requirements of design and application. The punching dimension is completely consistent with the design drawings with burr of 0.015-0.02 mm, and the punched part has smooth surface and accords with the stack inspection requirements.