The invention discloses Jun porcelain bluish white 
glaze and a preparation method thereof. The Jun porcelain bluish white 
glaze is prepared from the following raw materials in parts by weight: 43 parts to 48 parts of 
melilite, 13 parts to 19 parts of 
calcite, 15 parts to 21 parts of 
quartz, 2 parts to 3 parts of 
tin oxide, 2.5 parts to 3.5 parts of fired 
talc, 0.9 part to 1.1 parts of 
zirconium silicate, 1.5 parts to 2.5 parts of 
zinc oxide, and 1.5 parts to 2.5 parts of 
tourmaline. The preparation method of the Jun porcelain bluish white 
glaze comprises the following steps: (1) adding water into the raw materials and mixing; carrying out ball milling to obtain glaze 
slurry; (2) 
glazing; (3) firing at firing temperature of 1280 to 1300 DEG C. The Jun porcelain bluish white glaze and the preparation method of the Jun porcelain bluish white glaze disclosed by the invention have the beneficial effects that by adding chemical raw materials including 
tin oxide, 
zinc oxide and 
zirconium silicate into a conventional 
raw material, so that the finished product rate is increased from originally being less than 50 percent to 80 percent or above; by adding the 
tourmaline, the product can slowly release negative ions to surrounding environment, so that certain antibacterial and deodorizing effects are achieved.