The invention belongs to the technical field of iron and steel metallurgy, and particularly relates to a production technology for controlling B-type inclusions in pipeline steel. The production technology sequentially comprises the processes of hot metal pretreatment, converter smelting, converter tapping, LF furnace refining and continuous casting, wherein the LF furnace refining process sequentially comprises the steps of energized heating treatment, B-type inclusion modification treatment and softblow treatment; the B-type inclusion modification treatment step comprises addition of a rareearth slag modification agent; calculated according to that the total mass percent of the rare earth slag modification agent is 100%, the rare earth slag modification agent comprises 50% to 60% of lime, 5% to 10% of rare earth, 20% to 25% of total aluminum and 5% to 15% of a fluxing agent. According to the production technology, the B-type inclusions in pipeline steel are controlled through the rare earth slag modification agent, the B-type inclusions in pipeline steel are converted into compound rare earth inclusions, removal of the B-type inclusions in a follow-up technology is facilitated,a traditional B-type inclusion calcium treatment production technology is simplified, and quality of pipeline steel is improved.