Production method of large-wall-thickness pipeline steel capable of improving carbon dioxide corrosion resistance and obdurability

The invention relates to the technical field of metallurgy, in particular to a large-wall-thickness pipeline steel production method capable of improving carbon dioxide corrosion resistance and obdurability, which comprises the following specific measures: (1) controlling a bottom blowing mode and end point requirements in a converter process; (2) the tapping time and the tapping hole replacement time are controlled in the tapping process; (3) CAS aluminum wire feeding is carried out, and CAS argon blowing time is controlled; (4) controlling the top slag adding amount, the heating time and the outbound mode in the LF refining process; (5) controlling wire feeding parameters, soft blowing time and RH requirements in the RH refining process; and (6) the precision requirement, the pulling speed fluctuation and the crystallizer liquid level fluctuation of continuous casting equipment are controlled in the continuous casting process, and a casting blank is obtained. Parameters of all procedures in the smelting and