The invention belongs to the technical field of ferrous alloy smelting, in particular to a production method of low-phosphorus micro-carbon ferro chrome. The production method comprises the following steps: feeding silicon-chromium alloy and ferro chrome to an electric arc furnace to smelt for 10-20min, feeding lime after the silicon-chromium alloy and the ferro chrome are molten for reaction, and finally discharging molten steel, wherein the mass ratio of the silicon-chromium alloy to the ferro chrome to the lime is 1:1:1.5, and the weight percentage content of phosphorus in the silicon-chromium alloy is lower than 0.017%. The method is simple and easy and low in cost, and can control that the content of phosphorus in the obtained micro-carbon ferro chrome is lower than 0.020%.