The invention belongs to the field of silicon steel manufacturing, and particularly relates to a preparation method for a thin-strip continuous casting strong Goss texture Fe-Si alloy thin-strip billet. The preparation method is conducted according to the following steps that (1) molten steel is smelted according to set components which comprise, by weight percentage, less than 0.005% of C, 2.8-3.2% of Si, 0.15-0.30% of Mn, 0.30-0.50% of Al, 0.005-0.01% of S, 0.003-0.008% of N, less than 0.008% of P and the balance Fe; and (2) thin-strip continuous casting is carried out to obtain a 2-3 mm casting strip. The pouring temperature is controlled to be 1530-1560 DEG C, the angle of the arc of contact of the molten steel and a casting roller is 35-50 degrees, and the casting speed is 17-22 m/min. The long axis direction of obtained silicon steel casting strip grains and the casting strip normal direction are at an inclination angle larger than or equal to 20 degrees, the average grain size is about 170-270 micrometers, and the volume fraction of the Goss texture is larger than 4.0%. The preparation method can remarkably improve the Goss texture in the thin-strip continuous casting silicon steel casting strip, the process is simple and stable, and good strip billet materials can be provided for preparation of silicon steel.