Anti-crack bridge steel CSP production method

The invention discloses an anti-crack bridge steel CSP production method. The anti-crack bridge steel CSP production method adopts a converter-refining-continuous casting production process, and comprises the following steps: (1) the carbon content of a steel grade in a smelting procedure is controlled, and the carbon content is controlled to be 0.06-0.08% according to the mass percent; (2) the nitrogen content of the steel grade is controlled in the smelting procedure, and the nitrogen range is controlled to be 0-25 ppm; (3) components of steel ladle top slag are controlled, and the Ca/Al ratio ranges from 1.10 to 1.65; (4) in the continuous casting procedure, electromagnetic braking is adopted on the upper portion of a crystallizer, and the current range is 150A-300 A. The electromagnetic stirring technology is adopted for the lower portion of the crystallizer, the current range is 500-800 A, and the non-uniformity of a solidification blank shell before solidification is improved through electromagnetic sti