The invention discloses a single storage cylinder type five-layer co-extrusion plastic hollow forming die head. The single storage cylinder type five-layer co-extrusion plastic hollow forming die head comprises a thickness adjustment oil cylinder, an injection oil cylinder, an injection and storage die body, a forming die opening and a core lifting bar, wherein the thickness adjustment oil cylinder, the injection oil cylinder, the injection and storage die body and the forming die opening are sequentially stacked and fixedly connected together. The injection and storage die body is provided with a first feed port, a second feed port, a third feed port, a fourth feed port and a fifth feed port. In work, materials are fed into the five feed ports at the same time, material blanks of all layers enter the storage cavity of a storage cylinder through corresponding plastic runners for collection, plastic of five layers is formed at a time and closely attached, becomes firm and does not leak, and then a plastic container is multifunctional. The thickness adjustment oil cylinder can adjust the forming die opening and then adjust the thickness of formed plastic. According to the invention, the thickness of the material blanks of the five layers can be uniform, the material blanks of the five layers can be combined tightly after extrusion forming, and the service life of the plastic container is prolonged.