The invention relates to a complete polishing glaze archaizing brick overglaze and a preparation method thereof. The complete polishing glaze archaizing brick overglaze is prepared from the following raw materials by weight percent: 4-8% of albite, 9-12% of potassium feldspar, 12-15% of calcite, 4-6% of barium carbonate, 6-10% of alumina, 12-15% of burnt talcum, 2-4% of zinc oxide, 2-5% of quartz powder, 9-13% of kaolin, 5-9% of wollastonite and the balance of impurities. The preparation method comprises the following steps: carrying out ball milling in a ratio of weighed raw material to ballstone to ethylene glycol to squeegee oil of 1: (1.8-2): 0.25: 0.3, and simultaneously controlling the fineness degree as follows: the screenings of 325-mesh sieve is 0.3-0.4%; printing on ground glaze and fancy glaze layers through 100-mesh silk screen by using a continuous printing process; and finally, firing through a liquefied gas raceway kiln firing system. According to the invention, the purposes of improving the stability of the process and the quality of the product, reducing glaze material loss in production process, reducing cost and simultaneously avoiding the generation of a screen sticking problem in production are achieved.