The invention discloses high silicon steel for thin slab casting and rolling production. The high silicon steel comprises the following components in percentage by weight: less than or equal to 0.003 percent of C, 4.5-7.0 percent of Si, 0.25-1.0 percent of Mn, less than or equal to 0.008 percent of Al, less than or equal to 0.0050 percent of S, less than or equal to 0.0030 percent of N and less than or equal to 20PPm of [O]. The preparation method comprises the following steps: smelting; casting; heating the cast slab; rolling; coiling; insulating in a bell-type furnace; performing warm-rolling, namely performing cold rolling at a temperature of 150 to 500 DEG C; and annealing at a high temperature. On the basis of the conventional thin slab casting and rolling equipment, a proper casting process is adopted, the columnar crystal ratio is improved, and the columnar crystal size is reduced; and the hot-rolling process is controlled, a fine fiber structure is obtained, and the warm-rolling property is guaranteed. The high silicon steel with good processability and magnetic performance can be produced.