The invention discloses a production method for improving the insulating property by adding trace elements in an oriented silicon steel barrier-coat. The production method comprises the following steps of smelting, processing in vacuum, refining and continuously casting into a blank; carrying out hot rolling; normalizing and acid pickling; carrying out once cold rolling, wherein the reduction rate is greater than or equal to 82%; decarbonizing and annealing, wherein the temperature is 750-890 DEG C, the atmosphere dew-point temperature is 25-75 DEG C, the decarbonization time is 90-350 seconds, and the total oxygen [O] of the surface of a steel belt is greater than or equal to 170 / t and less than or equal to 315 / t; coating a magnesium oxide coating added with trace elements on the surface of the steel belt; carrying out high temperature annealing, wherein the atmosphere dew-point temperature is less than or equal to 30 DEG C, two low thermal insulation steps and one high thermal insulation step are arranged, and the nitridation amount of nitrogen is greater than or equal to 16ppm; stretching and smoothing and annealing, namely, coating, annealing and smoothing. In high temperature annealing stage, silicon dioxide and magnesium oxide on the surface of the steel belt carry out chemical reaction so as to generate a magnesium silicate bottom layer, and additives are added into the magnesium oxide coating so as to help to obtain excellent finished product magnetism and good magnesium silicate bottom layer.