The invention provides a single-chip type sacrificial anode capable of preventing a submarine pipeline from being corroded. The sacrificial anode is of an arc shape and the arc-shaped sacrificial anode is installed on the upper portion of the submarine pipeline. Multiple axial reinforcing ribs and multiple circumferential reinforcing ribs are arranged inside the sacrificial anode and the multiple axial reinforcing ribs and the multiple circumferential reinforcing ribs are interwoven so that a net shape can be formed. The two ends of the sacrificial anode are respectively provided with a plurality of sacrificial anode contacts. The single-chip type sacrificial anode capable of preventing the submarine pipeline from being corroded is simple in structure, the risk that the sacrificial anode and an anti-corrosion layer are damaged when the submarine pipeline is laid is avoided, when the sacrificial anode passes through an idler wheel, the supporting force of the idler wheel and the load of the laid submarine pipeline can not be increased, the risks of laying of the submarine pipeline are reduced, and the safety of submarine pipeline laying operation is improved.