The utility model discloses an LNG quick cooling storage tank, comprising an outer container, an inner container, and a pipeline connected to the inner container through the outer container and arranged on the outer side of the outer container. A support system is provided between the outer wall of the inner container and the inner wall of the outer container. The support system includes an axial support and two sets of radial supports respectively arranged on the inner container and the lower two ends. The distance between the two sets of radial supports is ≥ 2/3 of the length of the inner container. The axial support includes a bottom support fixedly connected to the bottom of the inner container and the inner wall of the outer container. The inner wall of the outer container is welded together, and a sling is uniformly arranged in the circumferential direction. Each set of radial supports has four radial support points, which are arranged in an array. Molecular sieve adsorption is set on the head of the inner container. The device is equipped with an anti vortex device at the bottom of the inner container and a shell safety explosion-proof device at the top of the outer container. The safety factor of the storage tank is high, High integration and large geometric volume, suitable for natural gas storage throughout the service life