Thin Slab can be cast at higher speed in TSCC-DR(Thin Slab Continuous Casting and Direct Rolling).According to the characteristics,such as “thin”,“fast” and “direct”of TSCC-DR,the function of varied-section mould,casting rolling,non-sinusoidal oscillation,electromagnetic braking for high casting speed(4-6 m/min)are analyzed.Then,it is considered that the nature of casting thick slab is almost as same as that of casting thin slab through technology comparison,and thick slab can be cast at same speed as thin slab,in this way a one strand caster is able to match a mill.