The invention relates to an azure jun porcelain glaze. The azure jun porcelain glaze is prepared from components in parts by weight as follows: 50-60 parts of potassium feldspar, 15-18 parts of calcite, 13-15 parts of talc, 8-12 parts of fluorite, 8-12 parts of clay, 8-13 parts of a wanyao glaze stone, 0.3-1 part of tin oxide and 0.2-0.8 parts of copper oxide. The formula composition is simple, a preparation method is simple and easy, sintering temperature range is wide, the prepared azure jun porcelain glaze has smooth and flat glaze surface, is high in stability and has bright azure color which is greenish blue, and the glaze surface is even and clean.