The invention discloses a method for preparing high-magnetic induction and high-strength non-oriented silicon steel based on thin strip continuous casting, and belongs to the technical field of metallurgy. The method comprises the following steps: (1) molten steel is smelted according to set components, and comprises the following components in percentage by weight: 0.001-0.005% of C, 2.4-3.5% of Si, 0.2-2% of Mn, 0.35-1.0% of Alt, 0.4-3% of Ni, 0.5-4% of Cr, 0.02-0.2% of Sn, O not more than 0.005%, S not more than 0.005%, N not more than 0.005%, P not more than 0.005%, and the balance of Fe; (2) the molten steel is cast in a double-roller thin strip continuous casting device for continuous casting; (3) a cast strip is secondarily cooled to reach room temperature, and is hotly rolled by singly gate; (4) the cold rolling is performed after acid washing; and (5) finally, the annealing treatment is performed; an insulation coating layer is coated online; and the winding is performed at last. The method can exert inherent advantages of thin strip continuous casting to the greatest extent, improves the magnetic performance and the mechanical performance of thin strip continuous casting electrical steel products, and is simple in preparation, environment-friendly and energy-saved in production process, low in investment cost and high in production efficiency.