The invention discloses a formula of ultra-thin glass. The ultra-thin glass is prepared from, by weight, 40-60 parts of nickel slag, 10-12 parts of alumina, 8-10 parts of ferric oxide, 14-16 parts of silver nitrate, 6-8 parts of sodium oxide, 4-8 parts of manganese oxide, 5-7 parts of zirconium oxide, 3-5 parts of chrome oxide, 20-30 parts of copper powder binder, 1-2 parts of graphite powder, 10-14 parts of silver powder, 10-18 parts of auxiliary filler tin powder, 3-9 parts of hydroxybenzophenone, 6-10 parts of barium oxide, 5-9 parts of potassium permanganate, 2-4 parts of potassium dichromate and 7-11 parts of disodium edetate dihydrate. A preparation technology of the ultra-thin glass includes the steps that raw materials are mixed according to the formula and placed in a ball mill to be evenly mixed, the raw materials pass through an alkali solution pond, after being dried, the raw materials are added into a pure oxygen pond kiln, the pure oxygen pond kiln is powered on for fluxing, fluxing is performed for 40-60 min, annealing is performed in an annealing furnace for 5 h, then annealed products are poured into a graphite crucible, heating continues, clarifying homogenization treatment is performed, and a glass solution obtained after clarifying homogenization treatment is added into the glass pond kiln, enters a tin tank through lip bricks, is slowly cooled and is drawn into glass through an edge roller.