The invention discloses a production method of continuous casting thin slabs and belongs to the technical field of thin slab continuous casting. The production method of the continuous casting thin slabs includes the steps of conducting casting forming of a slab by using a parallel plate crystallizer, entering lengthened vertical roller section after secondary cooling section, greatly reducing thethickness of the slab as the slab with liquid core is depressed by long intervals on both sides of inner and outer arcs, conducting large arc radius bending straightening, producing a thin slab witha thickness of 80-120 millimeters at a casting speed of 4 to 6 meters per minuter under the synchronous drive of multiple sets of driving rollers. The production method of the continuous casting thinslabs has the advantages of overcoming various problems such as complicated existing thin slab continuous casting process, small capacity of the crystallizer, large frictional resistance and short service life of an immersion nozzle, and realizing high-speed continuous casting of the thin slabs.