The invention provides lusterless blue glaze. The blue glaze is prepared from raw materials in parts by weight as follows: 47-53 parts of white feldspar, 9-15 parts of quartz, 10-16 parts of calcite,4-6 parts of kaolin, 0.5-1.5 parts of limestone, 4-6 parts of zinc oxide, 0.5-1.5 parts of blue powder, 1.5-2.5 parts of block tin and 8-14 parts of wood ash. Compared with the prior art, the fired blue glaze is lusterless and has jade texture, high opacification property and high yield of 90% or higher with the scientific and reasonable raw material proportion and a controlled firing technology.