Preparation method of corrosion-resistant reinforcing steel bar

The invention discloses a preparation method of a corrosion-resistant steel bar in the field of steel casting, which comprises the following steps: 1) blowing molten steel in an LD converter, and tapping when the content of C in the blown molten steel is less than 0.05 wt% and the content of P is less than or equal to 0.045 wt%; 2) hoisting the blown molten steel to a refining process, performing LF (ladle furnace) external refining, and adding lime and ferrosilicon powder for refining and slagging after the molten steel enters a station; (3) component adjustment operation is conducted, rare earth alloy wires are fed to adjust the content of cerium and lanthanum, and soft blowing is conducted; 4, the molten steel obtained after LF refining is hoisted to a CCM continuous casting procedure for whole-course protective casting, the preparation method is low in cost, meanwhile, the prepared corrosion-resistant steel bar has good corrosion resistance, and the problems that a traditional corrosion-resistant ...