Shallow water oil-gas platform using underwater flexible storage device

The invention discloses a shallow water oil-gas platform using an underwater flexible storage device. The shallow water oil-gas platform comprises a wellhead platform and a production module. Both the wellhead platform and the production module are provided with pile foundation parts. The pile foundation part of the production module is provided with a support base. The underwater flexible storage device fixedly connected with the production module is arranged under the production module. The underwater flexible storage device is placed on the support base, and the underwater flexible storage device and the support base are connected through a horizontal locating structure. The underwater flexible storage device comprises a sealed storage tank and a plurality of storage single bodies. The multiple storage single bodies are vertically arranged and fixedly connected in the sealed storage tank. The sealed storage tank is provided with a water pipe communicating with the outside. Each storage single body is provi