Jun red glaze is prepared from the following raw materials in parts by weight: 37 to 43 parts of melilite, 13 to 19 parts of quartz, 10 to 16 parts of calcite, 4.5 to 5.5 parts of sodium metasilicate, 12 to 18 parts of frit, 0.5 to 1.5 parts of bovine-derived power, 2.5 to 3.5 parts of stannic oxide, 3.5 to 4.5 parts of zinc oxide, 2 to 3 parts of talc, and 0.25 to 0.75 part of copper oxide. Compared with the prior art, through scientific and reasonable raw material matching and control on the firing process, the prepared jun red glaze is bright in color, good in glossiness, and moderate in flowability, and has fine cracks, the glazing colors are rich, on the basis of jun red, the colors including yellow, blue, purple and the like exist, the color transition is clear, distinct and natural, the rate of finished products is high, reaching 75% or above, the blank of no colorful graze exists in jun red glaze is filled, and a new variety is provided for jun red glaze.