The utility model relates to a prefilled syringe seals syringe forming device belongs to prefilled syringe and seals equipment technical field. Include forming worktable, the last shaping station thatis equipped with of forming worktable corresponds the shaping station, and it blows to be equipped with removes the bits device, blows and leads to air through tube and feed through the gas holder including the blowing nozzle of locating shaping station top, the blowing nozzle other end except that considering the device to be worth doing, and trachea middle section upper portion is equipped withspacing subassembly, and spacing subassembly includes the limiting plate, is equipped with the gag lever post on the limiting plate, and the first end of gag lever post passes through spacing hub connection limiting plate, and the gag lever post both sides are equipped with first spacing post and the spacing post of second respectively, correspond gag lever post second end, gag lever post upper portion is equipped with down the air cylinder. The utility model discloses can effectively get rid of prefilled syringe and seal the piece in the syringe forming process, improve product quality.