The filling line specifically for 5-gallon barrels of drinking water, those types (barrels/hour), integrates a bottle washer, filler and sealer into one unit. To achieve the purpose of multiple injections of washing and sterilizing using liquid washing and bleaching are used in a bottle washer washing solution can be used circularly. The sealer can seal barrel caps automatically. This line is equipped with a water spraying device to sterilise caps of bottles to ensure those caps are aseptic and hygienic. Also, this line can automatically carry out barrel feeding, washing, sterilizing, filling, capping, counting and product discharging. It is a new kind of barreled water auto-producing line which integrates mechanisms, electricity and pneumatic technology.