The invention discloses a preparation method of a jun porcelain heat preservation cup with metal luster and an anti-bacterial function. According to the method, 25-30 parts of kaolin soil, 15-20 partsof potassium feldspar, 5-10 parts of quartz, 5-10 parts of chinastone, 5-8 parts of tourmaline and 3-5 parts of bentonite are obtained, sealing rods and a blank body with an interlayer and reserved holes are prepared, and presintering is carried out; 5-8 parts of tourmaline, 12-15 parts of Muyu stone, 25-35 parts of albite, 45-50 parts of quartz, 10-15 parts of calcite, 15-20 parts of sintered kaolin soil, 12-15 parts of chinastone, 5-10 parts of zirconium silicate and 2-3 parts of stannic oxide are adopted for preparing glaze materials to be applied to the outer and inner walls of the presintered blank body and the surfaces of the sealing rods; the sealing rods are inserted into the reserved holes of the blank body, then the blank body is placed into a vacuum sintering oven, a vacuum pump is switched on to pump air in the interlayer, and the glaze materials on the sealing rods and the interlayer are melted to achieve sealing between the sealing rods and the blank body; then the outerwall of the densified ceramic heat preservation cup body after glaze firing is plated with a metal membrane and an anti-bacterial nanometer coating. The prepared jun porcelain heat preservation cup has not only the metal texture but also the anti-bacterial function.