Abstract: This application provides a load-bearing support plate, chain structure, and a conveyor belt structure incorporating them, the load-bearing support plate comprises a first panel, a second panel, and a transition panel for connecting the first panel with the second panel; the first panel is offset in a first direction relative to the second panel, at least one reinforcing rib provided on the first panel, the reinforcing rib extending upwards from the bottom of the first panel to the upper edge of the first panel and forming a bearing surface with the top surface of the first panel. By forming the first panel into a curved shape with the use of reinforcing ribs, the overall support capability is enhanced. Also, by extending the reinforcing ribs to the upper edge of the first panel, the upper edge of the support plate below becomes curved, offering a larger contact area in the thickness direction, thereby improving the stability of the spiral stacking motion.