A shelving structure may include at least four vertical posts, at least four annular spacers, and at least a shelf board, and the posts are configured to be mounted on the shelf board through the annular spacers. The shelf board has a frame and a panel, and a convex portion is formed at an inner edge of the frame. At least eight horizontal supporting boards are formed at four upper edges and four lower edges of the frame respectively. Each two adjacent supporting boards are not connected to each other, and each of four corners of the frame is bent to form a concave groove. Moreover, four arc boards are respectively assembled with the four concave grooves, and each of the arc boards has two wings configured to be welded with the convex portion of the frame to improve the structural strength of the shelving structure.