Automatic mineral water production line consists of water treatment equipment, bottle-in conveying, mineral water filling machine, and subsequent packaging. The finished product is conveyed into the bottle and the empty bottle is sent to the mineral water filling machine. The mineral water filling equipment automatically flips the empty bottle and resets it. The filling valve adopts a normal temperature and pressure valve with a backflow device; has a fast filling speed, stable filling, and no spray leakage. Cap screwing or capping mechanism for capping the bottle. The mineral water filling equipment completely eliminates human contact to ensure the whole process of filling and capping is aseptic.