A concave square tube lifting storage shelf is provided. The concave square tube lifting storage shelf includes a plurality of post components, two fixed storage layers and a plurality of moveable storage layers. These post components each include a concave square tube, with each concave square tube comprising a concave plate. Each fixed storage layer includes a fixed shelf and a first assembly component, with the first assembly component being mounted on the fixed shelf. The first assembly component is fitted onto the outer side of the concave square tube, and the fixed storage layer is assembled between the post assemblies via the first assembly component. The movable storage layers each include a movable shelf and a second assembly component, with the second assembly component mounted on the movable shelf. The movable storage layers can move in the lifting direction.