The invention discloses a preparation method of a two-man ladle for industrial silicon smelting. The preparation method comprises the following steps: processing a hollow two-man ladle housing in an inverse truncated cone shape with a steel plate; paving an asbestos board heat insulation membrane on the inner wall of the two-man ladle housing; building a layer of high-alumina brick ring chamber on the heat insulation membrane; putting a hollow mold barrel, which is made of a steel plate and is on the same central line as the two-man ladle housing, in the inverse truncated cone shape, into the ring chamber built by a high-alumina brick layer; reserving an annular gap between the mold barrel and the high-alumina brick layer for later use; finally, manufacturing the two-man ladle by the following procedures of blending, pouring, maintaining, demolding, drying and baking of special castable for the two-man ladle. The two-man ladle manufactured by the method is smooth in wall, and easy to clean; the time for cleaning and repairing the two-man ladle is shortened; the ladle wall is free of a gap; the accident rate of silicon leakage of the ladle wall is lowered; the oxidation erosion resistance is enhanced; the number of use is increased; the two-man ladle can be reused for 22 times in the first time, and can be reused for 22 times after being repaired each time; and the two-man ladle can be poured again after being repaired for 22 times, so that the use cost of the two-man ladle is greatly reduced; and the method is a practical and economical technique.