The invention belongs to the technical field of water stop belts, preparation dies and preparation methods and discloses an anti-aging compound waterproof adhesive tape, the preparation die and the preparation method. The anti-aging compound waterproof adhesive tape is mainly technically characterized by comprising an adhesive tape body with U-shaped cross section and end enclosures positioned at two ends of the adhesive tape body, a water discharge outlet is arranged at the bottom part of the adhesive tape body, a water discharge pipe which is communicated with the water discharge outlet is arranged below the adhesive tape body, and the anti-aging compound waterproof adhesive tape is characterized in that the adhesive tape body, the end enclosures and the water discharge pipe are constituted by the following materials in parts by weight: 100 parts of ethylene propylene diene monomer, 12-18 parts of PVC, 17-22 parts of plasticizer, 14-18 parts of stabilizer, 35-46 parts of additives, 3.0-3.5 parts of promoter, 4.2-5.2 parts of nano-vulcanization aid and 4.2-5.3 parts of coupling agent; furthermore, the adhesive tape body and the end enclosures, and the adhesive tape body and the water discharge pipe are respectively bonded together by adopting the postvulcanization method. Therefore, the anti-aging compound waterproof adhesive tape can increase the tensile strength at break by 1.7, increase the elongation at break by 22%, reduce the brittleness temperature by 18, and increase the aging coefficient by 0.13.