The invention relates to a production method of high-magnetic-induction-orientated silicon steel with the low inclusion defect rate. The production method comprises the steps that smelting: argon blowing is conducted in the whole process of converter smelting; at the after-furnace end point of a converter, C is controlled to be less than or equal to 0.040%, P is controlled to be less than or equalto 0.011%, and S is controlled to be less than or equal to 0.005%; slag in the converting process has the alkalinity of 3.0-3.5 and the thickness less than or equal to 80mm; the slag is pushed off when steel tapping is finished; calculating the width of a liquid phase line of actual smelting components of high-magnetic-induction-orientated silicon steel; utilizing the calculated liquid phase linewidth result, controlling the superheat degree of molten steel in a tundish and controlling the temperature in the solidification process to be within 90-130 DEG C; and conducting electromagnetic stirring in the continuous casting process, conducting hot charging on a casting blank after continuous casting and controlling the temperature of the casting blank to be greater than or equal to 700 DEGC. The production method has the advantages that the width of the liquid phase line of the smelting components can be quickly and accurately calculated; the continuous casting technological parameters are reasonably designed according to the calculation result; the quantity of inclusions in a steel plate is effectively controlled; the finished steel rate is increased; the cost is saved; and wasteis reduced.